specialsteels catalogue may2021 colourcorrect

PRODUCT CATALOGUE

SPECIAL STEELS

1SPECIAL STEELS

With a rich legacy spanning over 116 years, we are immensely proud of

our status as leading manufacturer, merchandiser and distributor of

steel and value added steel products.

Our extensive product portfolio, robust infrastructure and technical

competencies, combined with our continuous improvement initiatives

has solidified our reputation as the pre-eminent supplier of steel on the

African continent.

At Macsteel, we operate through a strategic network of over 40 service

centres, branches and warehouses, enabling us to provide our valued

customers with exceptional levels of personalised service throughout

the entire steel supply chain.

11SPECIAL STEELS

CARBON STEEL 1

070M20 (EN3A) 1

080M40 (EN 8) 2

070M55 (EN9) 4

150M19 (EN14) 6

ALLOY STEEL 7

709M40 (EN19) 7

817M40 (EN24) 9

826M40 (EN26) 11

835M30 (EN30B) 12

655M13 (EN36B) 13

PHYSICAL PROPERTIES 14

LIMITING RULING SECTION (LRS) 14

HEAT TREATMENT CONDITIONS 14

COLOUR CHART 15

THEORETICAL MASS CALCULATIONS 16

HOLLOW BAR 17

St 52.0 18

HB SIZE AND WEIGHT CHART 19

BRIGHT BAR 22

SAE 1018 23

080A42 (EN8) 24

230M07 26

SAE 12L14 27

HARDNESS CONVERSIONS 28

HEAT TREATMENT PROCESS RANGE 29

HEAT TREATMENT OF STEELS 30

HEAT TREATMENT PROCESSES 31

HEAT TREATMENT FURNACES UTILISED 32

METALLURGICAL SERVICES 33

GLOSSARY OF METALLURGICAL TERMS 34

FACT SHEET ON ALLOYING AND ACCOMPANYING ELEMENTS IN STEEL 37

ABBREVIATIONS 38

ACCREDITATION 39

ISO 9001:2015 39

ISO 14001:2015 40

ISO 45001:2018 41

Contents

1SPECIAL STEELS

(0.20% CARBON STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 3 A - BS 970:1955)

CARBON STEEL | 070M20

070M20BLACK:

As Rolled or AsForged Black Bar

%MinMax

C0.160.24

Si0.100.40

Mn0.500.90

S-

0.050

P-

0.050

Chemical composition limits

Size ranges offered

Mechanical properties

Heat treated condition

NormalizedNormalized

LRS(mm)

150250

Hardness(BHN)

126 - 179*116 - 170*

U.T.S.(MPa)

430 min400 min

Y.S.(MPa)

215 min200 min

Elongation(%)

21 min21 min

Heat treatment• Normalizing - re-heat (austenizing) between 880°C and 910°C followed by cooling in still air• This grade is normally not hardened (quenched and tempered)• Where material is above the LRS, only the surface hardness will be given as a guide and mechanical properties will be for information only

Condition of delivery• As-rolled or as-forged - hardness generally should not exceed 255HB, mechanical properties not guaranteed• Normalized - to BS970:Part 1:1983 requirements or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

*Hardness is for guidance only

Max

(mm)16.320.322.324.325.3

30.4532.4535.4536.4538.4540.645.650.655.860.866.271.2

Nominaldiameter

(mm)1620222425303235363840455055606570

Calculatedweight(kg/m)1.5782.46629843.5513.8535.5496.3137.5527.9908.9029.864

12.48415.41318.64922.19426.04730.209

Min

(mm)15.719.721.723.724.7

29.5531.5534.5535.5537.5539.444.449.454.259.263.868.8

Max

(mm)76.2

81.5786.5791.596.5

101.5106.5111.5116.5121.5126.5131.5141.5151.5161.5173183

Nominaldiameter

(mm)7580859095

100105110115120125130140150160170180

Calculatedweight(kg/m)34.67839.45644.54249.93755.63961.65067.96974.59781.53288.77696.328

104.189120.834138.713157.824178.169199.746

Min

(mm)68.8

78.4383.4388.593.598.5

103.5108.5113.5118.5123.5128.5138.5148.5158.5170180

Max

(mm)193206213223234244254265275285311326336346356387412

Nominaldiameter

(mm)190203210220230240250260270280305320330340350380405

Calculatedweight(kg/m)222.557254.053271.877298.386632.129355.104385.313416.754449.429483.336573.499631.296671.369712.674755.213890.226

1011.214

Min

(mm)190203210220230240250260270280305320330340350380405

Typical usesShafts, bolts, studs, couplings & machinery components where low tensile strength material is required.

2SPECIAL STEELS

(0.40% CARBON STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 8 - BS 970:1955)


080M40GREEN:


%MinMax

C0.360.44

Si0.100.40

Mn0.601.00

S-

0.050

P-

0.050




NormalizedNormalizedQR

LRS(mm)

1502506319

Hardness(BHN)

152 - 207*146 - 197*179 - 229201 - 255

U.T.S.(MPa)

550 min510 min625 - 775700 - 850

Y.S.(MPa)

280 min245 min385 min465 min

0.2% P.S.(MPa)

--

355 min450 min

Elongation(%)

16 min17 min16 min16 min

Impact strength(J)

16 min-

28 min28 min

Heat treatment• Normalizing - re-heat (austenizing) between 830°C and 860°C followed by cooling in still air• Hardening - re-heat between 830°C and 860°C followed by quenching in oil• Tempering - generally between 550°C and 660°C• Where material is above the LRS for a specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only

Condition of delivery• As-rolled or as-forged - hardness generally should not exceed 321HB, mechanical properties not guaranteed• Heat treated - to BS970:Part 1:1983 requirements or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

*Hardness is for guidance only

3SPECIAL STEELS


Size range in round bar and square bar offered

Square bar (round cornered)

Max

(mm)16.320.322.324.325.327.328.3

30.4532.4535.4536.4538.4540.642.645.648.650.653.655.860.863.866.271.276.2

81.5786.5791.596.5

101.5104.5

Nominaldiameter

(mm)16202224252728303235363840424548505355606365707580859095

100103

Calculatedweight(kg/m)1.5782.4662.9843.5513.8534.4944.8335.5496.3137.5527.9908.9029.864

10.87512.48414.20415.41317.31718.64922.19424.46926.04730.20934.67839.45644.54249.93755.63961.65065.404

Min

(mm)15.719.721.723.724.726.727.7

29.5531.5534.5535.5537.5539.441.444.447.449.452.454.259.262.263.868.868.8

78.4383.4388.593.598.5

101.5

Max

(mm)106.5111.5116.5121.5126.5131.5136.5141.5151.5161.5173183193206213218223234244254265275285296311326336346356367

Nominaldiameter

(mm)105110115120125130135140150160170180190203210215220230240250260270280290305320330340350360

Calculatedweight(kg/m)67.96974.59781.53288.77696.328

104.180112.357120.834138.713157.824178.169199.746222.557254.053271.877284.977298.386326.129355.104385.313416.754449.429483.336518.477573.499631.296671.369712.674755.213798.984

Min

(mm)103.5108.5113.5118.5123.5128.5133.5138.5148.5158.5170180190203210215220230240250260270280290305320330340350360

Max

(mm)377387407433458n/an/an/an/a

Nominaldiameter

(mm)370380400425450480500525550

Calculatedweight(kg/m)843.989890.226986.400113.553

1246.4131420.4161541.2501699.2281864.913

Min

(mm)370380400425450480500525550

Max

(mm)40.5

45.5650.6355.6460.7565.8

70.8875.9293.2107

114.5

Nominaldiameter

(mm)4045505560657075

92.1105

112.5


Min

(mm)39.5

44.4449.3754.3659.2564.2

69.1274.891

103110.5

Typical usesDynamo and motor shafts, heat treated bolts and stus, crankshafts, connecting rods, driving rings and flanges, railway couplings, axles, brackets, housings and parts subjected to high stresses or wear, etc.

4SPECIAL STEELS

(0.55% CARBON STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 9 - BS 970:1955)


070M55YELLOW:

As Rolled or AsForged Black bar

%MinMax

C0.500.60

Si0.100.40

Mn0.500.90

S-

0.050

P-

0.050




NormalizedNormalizedRST

LRS(mm)

632501006319

Hardness(BHN)

201 - 255170 - 223201 - 255223 - 277248 - 302

U.T.S.(MPa)

700 min600 min700 - 850775 - 925

850 - 1000

Y.S.(MPa)

355 min310 min415 min480 min570 min

0.2% P.S.(MPa)

--

385 min450 min555 min

Elongation(%)


Heat treatment• Normalizing - re-heat (austenizing) between 810°C and 840°C followed by cooling in still air• Hardening - re-heat (austenizing) between 810°C and 840°C followed by quenching in oil• Tempering - generally between 550°C and 660°C• Where material is above the LRS for a specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only


Size ranges offered

Max

(mm)16.320.322.324.325.3

30.4532.4535.4536.4538.4540.645.650.655.860.866.271.276.2

81.57

Nominaldiameter

(mm)16202224253032353638404550556065707580


12.48415.41318.64922.19426.04730.20934.67839.456

Min

(mm)15.719.721.723.724.7

29.5531.5534.5535.5537.5539.444.449.454.259.263.868.868.8

78.43

Max

(mm)91.596.5

101.5106.5111.5116.5121.5126.5131.5141.5151.5161.5173183193206213223234

Nominaldiameter

(mm)859095

100105110115120130140150160170180190203210220230

Calculatedweight(kg/m)44.54249.93755.63961.65067.96974.59781.53288.776

104.189120.834138.713157.824178.169199.746222.557254.053271.877298.386326.129

Min

(mm)83.4388.593.598.5

103.5108.5113.5118.5128.5138.5148.5158.5170180190203210220230

Max

(mm)244254265275285311326336346356387412433458n/an/a

Nominaldiameter

(mm)240250260270280305320330340350380405425450475500


1011.214113.553

1248.4131390.9781541.250

Min

(mm)240250260270280305320330340350380405425450475500

Typical usesSprockets, cylinders, cams, crankshafts, keys, small gears, machine tools, grinding balls in ball mills, ball race rings, requiring moderate wear resistance, etc.

5SPECIAL STEELS


Max

(mm)150160175200230245275

6SPECIAL STEELS

(LOW CARBON-MANGANESE STEEL)SPECIFICATION - BS 2772:Part 2:1989(Formally known as EN 14 B)


150M19 WHITE, BLACK, GREEN:As Rolled or As

Forged Black Bar

WHITE, GREEN:Normalized Black Bar

WHITE, RED, GREEN:Heat treated Black Bar

%MinMax

C0.150.23

Si0.100.40

Mn1.301.70

S-

0.050

P-

0.050


As rolled or as forged/heat treated Size range offered in square bar


Condition

Hardened & tempered toBS2772:Part 2:1989

LRS(mm)

150250

Hardness(BHN)

152 - 207146 - 197

U.T.S.(MPa)

540 min540 min

Y.S.(MPa)

340 min340 min

Impact strength(J)

68 min*55 min*

Elongation(%)

24 min20 min

Heat treatment• Normalized - re-heat between 860°C and 900°C followed by cooling in still air• Hardening - re-heat between 860°C and 900°C followed by quenching in water or oil• Tempering - generally between 550°C and 670°C• Where material is above the LRS for a specific condition, the hardness and mechanical properties will be for information only. Only surface hardness will be guaranteed

Condition of delivery• As-rolled or as-forged - hardness generally should not exceed 280HB, mechanical properties not guaranteed• To BS970:Part 1:1983 requirements or BS 2772:Part 2:1989 or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

*Tested at -20°C

Max

(mm)75

88.43104.5116.5131.5178183203223

Nominaldiameter

(mm)7590

103115130175180200220


104.189188.803199.746246.600298.386

Min

(mm)74.8891 57101.5113.5128.5175180200220

Typical usesExtensively used for mine lifting and winding equipment, motor shafts, engineering and machinery parts where good weldability isimportant, etc.

Tolerances subject to supplying mill offering.

7SPECIAL STEELS

(1% CARBON, ¼% MOLY STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 19 - BS 970:1955)

ALLOY STEEL | 709M40

709M40 BROWN:As Rolled or As

Forged Black Bar

BROWN, BLUE:Rolled or Forged Black

Bar Heat Treated toCondition “T”

%MinMax

C0.360.44

Si0.100.35

Mn0.701.00

S-

0.04

P-

0.035

Cr0.901.20

Ni-

0.40

Mo0.250.35



Condition

AnnealedSpheroidize annealedRSSTUVW

LRS(mm)

--

250250150100632919

Hardness(BHN)

255 max235 max210 - 255223 - 277223 - 277248 - 302369 - 331293 - 352311 - 375

U.T.S.(MPa)

--

700 - 850775 - 925775 - 925

850 - 1000925 - 1075

1000 - 11501075 - 1225

0.2% P.S.(MPa)

--

480 min540 min570 min665 min740 min835 min925 min

Y.S.(MPa)

--


Elongation(%)

--


Impact strength(J)

--


Heat treatment• Hardening - re-heat (austenizing) between 860°C and 890°C followed by quenching in oil• Tempering - generally between 550°C and 700°C• Where material is above the LRS for a specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only Condition of delivery• As-rolled or as-forged - hardness generally should not exceed 321HB, mechanical properties not guaranteed• Normalized - to BS970:Part 1:1983 requirements or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

8SPECIAL STEELS


Size ranges offered

Max

(mm)20.322.324.325.3

30.4532.4535.4536.4538.4540.643.645.650.655.860.866.271.2

Nominaldiameter

(mm)2022242530323536384043455055606570


11.39912.48415.41318.64922.19426.04730.209

Min

(mm)19.721.723.724.7

29.5531.5534.5535.5537.5539.442.444.449.454.259.263.868.8

Max

(mm)76.2

81.5786.5791.596.5

101.5106.5111.5116.5121.5131.5141.5151.5161.5173183193

Nominaldiameter

(mm)7580859095

100105110115120130140150160170180190


104.189120.834138.713157.824178.169199.746222.557

Min

(mm)73.8

78.4383.4388.593.598.5

103.5108.5113.5118.5128.5138.5148.5158.5170180190

Max

(mm)206213223234244254265275285295311326336346356387412

Nominaldiameter

(mm)203210220230240250260270280290305320330340350380405

Calculatedweight(kg/m)254.053271.877298.386326.129355.104385.313416.754449.429483.336518.477573.499631.296671.369712.674755.213890.226

1011.214

Min

(mm)203210220230240250260270280290300320330340350380405

Typical usesAxles, cranksafts, connecting rods, gears, high tensile bolts and studs, propeller shaft joints, rifle barrels and breech mechanisms forsmall arms, induction hardened track pins, shafts, etc.

9SPECIAL STEELS

(1½% NICKEL, 1¼% CHROME, ¼% MOLY STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 24 - BS 970:1955)


817M40 RED:As Rolled or As

Forged Black Bar

RED, BLUE:Rolled or Forged Black

Bar Heat Treated toCondition “T”

%MinMax

C0.360.44

Si0.100.35

Mn0.450.70

S-

0.035

P-

0.04

Cr1.001.40

Ni1.301.70

Mo0.200.35



Condition

AnnealedSpheroidize annealedTTUVWXYZ*

LRS(mm)

--

2501501006329292929

Hardness(BHN)

277 max248 max248 - 302248 - 302269 - 331293 - 352311 - 375341 - 401363 - 429444 min

U.T.S.(MPa)

--

850 - 1000850 - 1000925 - 1075

1000 - 11501075 - 12251150 - 13001225 - 1375

1550 min

0.2% P.S.(MPa)

--


1005 min1080 min1125 min

Y.S.(MPa)

--


1020 min1095 min1235 min

Elongation(%)

--

13 min13 min12 min12 min11 min10 min10 min5 min

Impact strength(J)

--

35 min50 min42 min42 min35 min28 min21 min9 min

Heat treatment• Hardening - re-heat (austenizing) between 820°C and 850°C followed by quenching in oil• Tempering - generally not exceeding 660°C and avoiding temperatures between 280°C and 500°C if possible • Where material is above the LRS for a specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only Condition of delivery• As-rolled or as-forged - hardness generally should not exceed 321HB, mechanical properties not guaranteed• Normalized - to BS970:Part 1:1983 requirements or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

*Sulphur & phosphorous content shall not exceed 0.025% for material in condition Z unless agreed to otherwise

10SPECIAL STEELS


Size ranges offered

Max

(mm)20.325.3

30.4532.4535.4540.645.650.655.860.866.271.276.2

81.5786.5791.5

Nominaldiameter

(mm)20253032354045505560657075808590

Calculatedweight(kg/m)2.4663.8535.5496.3137.5529.864

12.48415.41318.64922.19426.04730.20934.67839.45644.54249.937

Min

(mm)19.724.7

29.5531.5534.5539.444.449.454.259.263.868.873.8

78.4383.4388.5

Max

(mm)96.5

101.5109.5116.5121.5131.5141.5151.5161.5173183193206213223234

Nominaldiameter

(mm)95

100108115120130140150160170180190203210220230


104.189120.834138.713157.824178.169199.746222.557254.053271.877298.386326.129

Min

(mm)93.598.5

106.5113.5118.5128.5138.5148.5158.5170180190203210220230

Max

(mm)244254265275285296311320326336356367387412

Nominaldiameter

(mm)240250260270280290305350320330350360380405

Calculatedweight(kg/m)355.104385.313416.754449.429483.336518.477573.499

400631.296671.369755.213798.984890.226

1011.214

Min

(mm)240250260270280290305370320330350360380405

Typical usesAxles, cranksafts, differential shafts, connecting rods, push rods, gears, high tensile bolts and studs, heavy duty connecting rods, automobilemain shafts, gun barrels and breech mechanisms, mandrels for tube manufacture , pinion sleeves, machine tool parts such as spindle gears,power transmission slide gears and cams, etc.

Size ranges offered

Max

(mm)60.871.2

104.5116.5

Nominaldiameter

(mm)6070

103115


Min

(mm)59.268.898.5

113.5

Max

(mm)126.5151.5161.5173

Nominaldiameter

(mm)125150160170

Calculatedweight(kg/m)96.238

138.713157.824178.169

Min

(mm)123.5148.5158.5170

Max

(mm)183206254

Nominaldiameter

(mm)180203250

Calculatedweight(kg/m)199.746254.053385.313

Min

(mm)180203250

Typical usesAxles, cranksafts, differential shafts, connecting rods, push rods, gears, high tensile bolts and studs, heavy duty connecting rods, automobilemain shafts, gun barrels and breech mechanisms, mandrels for tube manufacture , pinion sleeves, machine tool parts such as spindle gears,power transmission slide gears and cams, etc. Also winder parts in mining equipment, brake pins, tie rods and tie rod ends, turn buckles - generally supplied in the heat treated cndition to BS 2772:Part 2 for 826M31.

11SPECIAL STEELS

(2½% NICKEL, ¾% CHROME, ½% MOLY STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 26 - BS 970:1955)


826M40 BLACK, WHITE, RED:As Rolled or As

Forged Black Bar

BLACK, RED:Rolled or Forged Black

Bar Heat Treated toCustomer Requirements

%MinMax

C0.360.44

Si0.100.35

Mn0.450.70

S-

0.04

P-

0.035

Cr0.500.80

Ni2.302.80

Mo0.450.65



Condition

AnnealedSpheroidize annealedUUVVWWXYZ*

LRS(mm)

--

250150250150250150150150100

Hardness(BHN)

277 max255 max269 - 331269 - 331293 - 352293 - 352311 - 375311 375341 - 401363 - 429444 min

U.T.S.(MPa)

--

925 - 1075925 - 1075

1000 - 11501000 - 11501075 - 12251075 - 12251150 - 13001225 - 1375

1550 min

0.2% P.S.(MPa)

--

725 min740 min820 min835 min910 min925 min

1005 min1080 min1125 min

Y.S.(MPa)

--

740 min755 min835 min850 min925 min940 min

1020 min1295 min1235 min

Elongation(%)

--

12 min12 min12 min12 min11 min11 min10 min10 min7 min

Impact strength(J)

--

28 min42 min28 min42 min22 min35 min28 min28 min11 min

Heat treatment• Hardening - re-heat (austenizing) between 820°C and 850°C followed by quenching in oil• Tempering - generally not exceeding 660°C and avoiding temperatures between 280°C and 500°C if possible • Where material is above the LRS for a specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only Condition of delivery• As-rolled or as-forged - hardness generally should not exceed 321HB, mechanical properties not guaranteed• Normalized - to BS970:Part 1:1983 requirements or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

*Sulphur & phosphorous content shall not exceed 0.025% for material in condition Z unless agreed to otherwise

%MinMax

C0.260.34

Si0.100.35

Mn0.450.70

S-

0.025

P-

0.025

Cr1.101.40

Ni3.904.30

Mo0.200.35

12SPECIAL STEELS

(4% NICKEL, 1¼ CHROME, ¼% MOLY STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 30 B - BS 970:1955)


835M30PINK:

As Roll or AsForged Black Bar




AnnealedSpheroidize annealedZ

LRS(mm)

--

150

Hardness(BHN)

277 max255 max444 min

U.T.S.(MPa)

--

1550 min

Y.S.(MPa)

--

1235 min

0.2% P.S.(MPa)

--

1125 min

Elongation(%)

--

7 min

Impact strength(J)

--

16 min

Heat treatment• Hardening - re-heat between 810°C and 840°C followed by quenching in oil• Tempering - generally between 200°C and 280°C• Where material is above the LRS for a specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only


Size ranges offered

Max

(mm)35.4540.645.650.655.860.8

101.5116.5131.5151.5173223

Nominaldiameter

(mm)354045505560

100115130150170220

Calculatedweight(kg/m)7.5529.864

12.48415.41318.64922.19461.65081.532

104.189138.713178.169298.386

Min

(mm)34.5539.444.449.454.259.298.5

113.5128.5148.5170220

Typical usesHeavy duty gears, differential shafts, aero engine connecting rods, transmission components, gudgeon pins, heavy duty rollers bearing,breech mechanisms and components for small arms, plastic die casting parts, header dies and rings, etc.

13SPECIAL STEELS

(3½% NICKEL, 1% CHROME STEEL)SPECIFICATION - BS 970:Part 1:1983(Formally known as EN 36 B - BS 970:1955)


655M13BLUE:



Size ranges offered



Normalized & TemperedSpheroidize AnnealedHardened

LRS(mm)

--

19

Hardness(BHN)

223 max255 max

-

U.T.S.(MPa)

--

1000 min

Elongation(%)

--

9 min

Impact(J)

--

35 min

Heat treatment• Hardening - re-heat (austenizing) between 800°C and 820°C followed by quenching in oil• Tempering - generally depends on final case hardness requirements• Where material is above the LRS for specific heat treatment condition, only the surface hardness will be guaranteed and mechanical properties will be for information only

Condition of delivery• Generally annealed - hardness generally should not exceed 255HB, mechanical properties not guaranteed• Heat treated - to BS970:Part 1:1983 requirements or customer requirement as agreed between parties• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not exceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed - 2% of nominal diameter for rolled bar - 4% of nominal diamete for forged bar from 90mm up to 220mm diameter - 6% of nominal diameter for forged bar over 220mm up to 450mm diameter

*Sulphur & phosphorous content shall not exceed 0.25% for material in condition Z unless agreed otherwise.

Max

(mm)25.3

30.4535.4540.645.650.655.860.866.271.276.2

81.5786.5791.596.5

Nominaldiameter

(mm)253035404550556065707580859095


12.48415.41318.64922.19426.04730.20934.67839.45644.54249.93555.639

Min

(mm)24.7

29.5534.5539.444.449.454.259.263.868.868.8

78.4383.4388.593.5

Max

(mm)101.5106.5111.5116.5121.5131.5141.5151.5161.5173183193206213223

Nominaldiameter

(mm)100105110115120130140150160170180190203210220


104.189120.834138.713157.824178.169199.746222.557254.053271.877298.386

Min

(mm)98.5

103.5108.5113.5118.5128.5138.5148.5158.5170180190203210220

Max

(mm)234244254265275285311326336356367387412

Nominaldiameter

(mm)230240250260270280305320330350360380405

Calculatedweight(kg/m)326.129355.104385.313416.754449.429483.336573.499631.296671.369755.213798.984890.226

1011.214

Min

(mm)230240250260270280305320330350360380405

Typical usesHeavy duty gears for aircraft, automotive and heavy vehicle transmission components, engineering machinery, gearbox parts, steeringworms, track pins, rimming wheels, gudgeon pins, chuck jaws and screws, breech mechanisms and components for small arms, etc.

%MinMax

C0.100.16

Si0.100.35

Mn0.350.60

S-

0.035

P-

0.035

Cr0.701.00

Ni3.003.75

Mo-

0.10

14SPECIAL STEELS

PHYSICAL PROPERTIES | LIMITING RULING SECTION (LRS) | HEAT TREATMENT CONDITIONS

Limiting Ruling Section (LRS)Heat treated

conditionPQ

RSTUVWXYZ

Limiting ruling section size range (mm)U.T.S.(MPa)

550 - 700625 - 775

700 - 850775 - 925

850 - 1000925 - 1075

1000 - 11501075 - 12251150 - 13001225 - 1375

1550 min

Hardness(Brinell)152 - 207179 - 229

201 - 255223 - 277248 - 302269 - 331293 - 352311 - 375341 - 401368 - 429444 min

13 ≤ 19

080M40

070M55

709M40

> 19 ≤ 29

150M19

709M40817M40817M40817M40817M40

> 29 ≤ 63

150M19080M40

070M55

709M40817M40

> 63 ≤ 100

070M55

709M40817M40

826M40

> 100 ≤ 150150M19

709M40817M40826M40826M40826M40826M40826M40835M30

> 150 ≤ 250

709M40709M40817M40826M40826M40826M40

Heat Treatment ConditionsHeat treated

conditionAs per BS 970: Part 1:1983

PQRSTUVWXYZ

U.T.S.

(MPa or N.mm2)550 - 700625 - 775700 - 850775 - 925

850 - 1000925 - 1075

1000 - 11501075 - 12251150 - 13001225 - 1375

1550 min

Hardness

(Brinell)152 - 207179 - 229201 - 255223 - 277248 - 302269 - 331293 - 352311 - 375341 - 401368 - 429444 min

ApproximateU.T.S.

(Tonnes/in2)35 - 4540 - 5045 - 5550 - 6055 - 6560 - 7065 - 7570 - 8075 - 8580 - 90

100 min

Approximatehardness

(Rockwell C)83 - 96*88 - 99*

95* - 24 HRC98* - 27 HRC

23 - 3027 - 3429 - 3631 - 3935 - 4138 - 4547 min

*Hardness is Rockwell B (hardness too low to measure in Rockwell C).

15SPECIAL STEELS

PHYSICAL PROPERTIES | COLOUR CHART

Colour Chart

0.55% carbon steelBS 970:Part 1:1983As rolled or as forged black bar

070M55 Black Bar (EN9)

080M40 Black Bar (EN8)

0.40% carbon steelBS 970:Part 1:1983As rolled or as forged black bar

0.20% carbon steelBS 970: Part 1:1983As rolled or as forged black bar

070M20 Black Bar (EN3A)

Low carbon, sulphur free - cutting steelBS 970: Part 1:1983Cold drawn or peeled bright bar

230M07 Bright Bar (EN1A)

Low carbon, bright mild steelSAE J 403Cold drawn or peeled bright bar

SAE 1018 Bright Bar

Low carbon, leaded free - cutting steelSAE J 403Cold drawn bright bar

SAE 12L14 Bright Bar

0.40% carbon steelBS 970: Part 1:1983Cold drawn or peeled bright bar

080A42 Bright Bar (EN8)

Low carbon steel, Material no. 1.0421DIN 1629:1984

ST25.0

1½% nickel, 1¼% chrome, ¼% moly steelBS 970: Part 1:1983As rolled/forged or heat treated

817M40 (EN24)

4% nickel, 1¼% chrome, ¼ Moly steelBS 970: Part 1:1993Annealed black bar

835M30 (EN30B)

3½% nickel, 1% chrome steelBS 970: Part 1:1983As rolled or as forged black bar

655M13 (EN36B)

2½% nickel, ¾% chrome, ½% moly steelBS 970: Part 1:1993As rolled/forged or heat treated

826M40 (EN26)

1% chrome, ¼% moly steelBS 970: Part 1:1983As rolled/forged or heat treated

709M40 (EN19)

BS 2772:Part 2:1989As rolled or as forged black bar/normalized black bar/heat treated black bar

150M19 BLACK BAR (EN14)

CARBON STEEL

HOLLOW BAR

BRIGHT BAR

ALLOY STEEL

16SPECIAL STEELS

PHYSICAL PROPERTIES | THEORETICAL MASS CALCULATIONS

Theoretical Mass Calculations (kg/m)

Note: Theoretically calculated weight may differ slightly from actual weighed mass.

Round Bar

D x D x 0.006165 = kg/m

Where:d = diameter (mm)

Flat Bar

w x T x 0.00786 = kg/m

Where:w = width (mm)T = thickness (mm)

Square Bar

t x t x 0.00786 = kg/m

Where:t = thickness (mm)

Hexagonal bar

T x T x 0.0068 = kg/m

Where:T = thickness across flats (mm)

Hollow Bar

(OD -wt) x wt x 0.02466=kg/m

Where:OD = outside diameter (mm)wt = wall thickness (mm)

Octagonal bar

T x T x 0.00651 = kg/m

Where:T = thickness across flats (mm)

17SPECIAL STEELS

HOLLOW BAR

Hollow Bar

18SPECIAL STEELS

HOLLOW BAR(LOW CARBON STEEL - MATERIAL NUMBER 1.0421)SPECIFICATION - DIN 1629:1984

HOLLOW BAR | St 52.0

St 52.0ORANGE:

As hot formed hollowblack bar

%MinMax

C-

0.22

Si-

0.55

Mn-

1.60

S-

0.035

P-

0.040

Al(1)

0.020-

N(2)

-0.012



Condition of delivery• As rolled or as hot formed - hardness generally does not exceed 240/260 HB but not guaranteed• Straightness shall not exceed 5mm over any 1000mm unless special straightness is required - not xceeding 2mm over any 1000mm• Sufficient material must be provided for to ensure all surface related defects are removed

Size range in round hollow bar offeredSee table on page 19.

Typical uses• General machine parts, hydraulic cylinders, flanges, couplings, etc.

1. Additional elements such as aluminium for fixing of nitrogen can be used (e.g. Altotal not less than 0.02%)2. A content in excess of the maximum value stated is permitted if a phosphorous content less than the maximum specified by 0.005% per 0.001% nitrogen is observed. However, the nitrogen content shall not exceed a value of 0.012% in the cast analysis and 0.014% in the product analysis3. Permitted variation in product analysis from cast analysis: C + 0.02%, S + 0.01%, P + 0.01% and N as per (2) above

Condition

As hot formed

WT(mm)≤ 16

≥ 16 ≤ 40≥ 40 ≤ 65

Hardness(BHN)

---

U.T.S.(MPa)

500 - 650500 - 650500 - 650

Elongation(%)

21 min21 min21 min

Y.S.(MPa)

355 min345 min335 min

19SPECIAL STEELS

HOLLOW BAR | HB SIZE AND WEIGHT CHART

HB Size and Weight Chart

max32.536.536.50.5

10.545.545.550.550.550.556.556.556.563.563.563.563.573.573.573.575.575.575.575.580.580.580.580.589.589.589.589.590.595.595.595.595.5

100.5102.5102.5107.1107.1107.1109.1109.1113.1113.1113.1115.1119.2119.2119.2119.2

nom32363640404545505050565656636363637373737575757580808080898989899095959595

100102102106106106108108112112112114118118118118

min31.535.535.539.539.544.544.549.549.549.555.555.555.562.562.562.562.572.572.572.574.574.574.574.579.579.579.579.588.588.588.588.589.594.594.594.594.599.5

101.5101.5104.9104.9104.9106.9106.9110.9110.9110.9112.9116.8116.8116.8116.8

Outside Diameter(mm)

max18.118.526.622.527.030.233.828.034.337.931.338.542.135.642.847.349.140.248.358.244.048.553.062.044.549.053.565.249.958.962.569.754.550.966.770.377.560.974.682.757.568.475.683.991.164.684.393.378.264.772.685.094.0

nom1616252025283225323628364032404547364556404550604045506345555967505063677556718056637180886380907363718090

min13.112.522.916.522.325.029.621.428.833.424.032.537.127.636.641.844.130.041.053.435.140.846.457.334.540.145.860.039.050.354.863.844.549.158.563.071.550.066.676.254.556.665.675.483.961.474.986.166.761.369.474.185.3

Inside Diameter(mm)

max9.7

12.06.8

12.09.1

10.38.0

14.610.98.6

16.312.09.7

17.913.410.99.7

21.816.310.120.217.414.69.1

23.020.217.410.325.319.617.412.923.023.218.516.312.025.317.913.226.325.220.716.812.625.819.113.524.228.924.922.616.9

nom8

105.5107.58.56.5

12.597

14108

15.511.5

98

18.5148.5

17.515

12.57.520

17.5158.52217151120

22.516141022

15.51125

21.517.51410

24.51611

20.527.523.51914

min6.78.54.58.56.37.25.4

10.87.65.8

12.18.56.7

13.59.97.66.7

16.212.17.2

15.313.010.86.3

17.515.313.07.2

19.314.813.09.4

17.521.813.912.18.5

19.313.59.4

23.718.314.711.57.9

23.213.38.8

17.326.122.115.911.4

Wall Thickness(mm)

± Weight(kg/m)

+%15151515151515

12.51515

12.51515

12.512.5151515

12.512.512.512.512.515

12.512.512.515

12.512.512.512.512.50.9

12.512.515

12.512.5150.9

12.512.512.5150.9

12.512.512.50.90.9

12.512.5

-%-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-0.9-10-10-10-10-10-10-0.9-10-10-10-10-0.9-10-10-10-0.9-0.9-10-10

-%4.9716.7324.5307.8006.4008.0336.900

12.8469.6008.000

15.20012.3109.943

19.06415.50013.00010.85126.10721.38714.19527.35023.80019.26613.10830.00028.00025.00015.73638.16631.69328.74122.21639.80042.40032.08028.80023.00044.43234.71625.91952.30047.10040.60034.07525.37555.50040.50030.00049.63064.10057.50049.50038.800

Tolerances

max126.3126.3126.3126.3133.3133.3133.3133.3141.4141.4141.4141.4151.5151.5151.5151.5151.5161.6161.6161.6161.6171.7171.7171.7181.8181.8181.8181.8181.8191.9191.9191.9191.9191.9191.9202.0202.0202.0214.1214.1214.1214.1226.2226.2226.2238.4238.4238.4252.5252.5252.5269.7269.7

nom125125125125132132132132140140140140150150150150150160160160160170170170180180180180180190190190190190190200200200212212212212224224224236236236250250250267267

min123.8123.8123.8123.8130.7130.7130.7130.7138.6138.6138.6138.6148.5148.5148.5148.5148.5158.4158.4158.4158.4168.3168.3168.3178.2178.2178.2178.2178.2188.1188.1188.1188.1188.1188.1198.0198.0198.0209.9209.9209.9209.9221.8221.8221.8233.6233.6233.6247.5247.5247.5264.3264.3


max72.781.795.7

103.878.495.5

102.7110.687.496.4

105.4116.988.597.5

111.9123.5129.698.6

107.6118.4137.1108.7124.9145.5109.8120.6132.3145.8155.6116.3127.1139.7146.9156.9165.7122.8148.0167.0135.8158.3167.3177.4143.4168.6187.7152.0179.0198.1162.5189.5208.8161.7179.7

nom718091

100719098

1068090

1001128090

10611812590

100112132100118140100112125140150106118132140150160112140160125150160170132160180140170190150180200147167

min69.378.385.595.663.684.593.3

101.472.683.694.6

107.171.582.5

100.1112.5120.481.492.4

105.6126.991.3

111.1134.690.2

103.4117.7134.2144.595.7

108.9124.3133.1143.1154.4101.2132.0153.0144.2141.7152.7162.6120.6151.4172.3128.0161.0181.9137.5170.5191.3132.3154.3

Inside Diameter(mm)

max28.524.020.415.334.924.420.015.934.428.923.417.240.034.525.719.515.640.134.628.017.440.230.318.645.839.232.123.818.748.141.533.829.424.418.850.435.024.550.036.230.725.752.837.427.055.238.728.257.541.030.668.757.7

nom27

22.517

12.530.52117133025201435302216

12.5353024143526154034

27.52015423629252015443020

43.53126214632224833235035256050

min25.521.014.110.026.117.614.010.125.621.116.610.930.025.518.312.59.4

29.925.420.010.729.821.711.434.228.823.016.211.335.930.524.220.615.611.237.625.015.537.025.821.316.339.226.617.040.827.317.842.529.019.452.342.3

Wall Thickness(mm)

± Weight(kg/m)

+%0.90.9

12.512.5101010

12.5101010

12.5101010

12.512.5101010

12.51010

12.510101010

12.510101010

12.512.51010

12.5101010

12.51010

12.51010

12.51010

12.51010

-%-0.9-0.9-10-10-10-10-10-13-10-10-10-13-10-10-10-13-13-10-10-10-13-10-10-13-10-10-10-10-13-10-10-10-10-13-13-10-10-13-10-10-10-13-10-10-13-10-10-13-10-10-13-10-10

-%68.51356.87047.55037.90079.10060.50051.20041.00085.60075.40062.14348.000

103.50094.10074.40057.60044.504

113.280101.40086.10056.000

121.50097.60061.698

146.380128.700110.10082.85865.370

158.400140.740121.000107.00088.03669.308

178.500133.46099.200

193.100146.260128.300106.630214.030159.090115.060238.000173.450132.200258.930194.840145.640321.590280.940

Tolerances

20SPECIAL STEELS


21SPECIAL STEELS


max269.7269.7275.7275.7275.7275.7301.0301.0301.0301.0301.0301.0327.2327.2327.2358.6358.6358.6358.6410.1410.1410.1430.3487.8

nom267267273273273273298298298298298298324324324355355355355406406406426483

min264.3264.3270.3270.3270.3270.3295.0295.0295.0295.0295.0295.0320.8320.8320.8351.5351.5351.5351.5401.9401.9401.9421.7478.2


max197.7213.0185.7210.9226.7232.0211.0220.0229.0238.0248.5252.0237.2269.6283.5268.6277.6286.6301.0320.1338.1347.1340.3420.5

nom187204173201217223198208218228238242224260274255265275291306326334326406

min176.3195.0160.3191.1207.3214.0185.0196.0207.0218.0227.5232.0208.3248.8263.3239.0250.2261.5279.5289.4311.9319.1309.2389.6

Inside Diameter(mm)

max46.737.357.742.334.230.958.052.547.041.536.734.559.539.232.059.854.248.639.660.349.145.560.549.1

nom40

31.5503628255045403530285032255045403250403650

38.5

min33.325.742.329.721.819.142.037.533.028.523.321.541.825.618.641.537.032.525.340.931.927.440.728.9

Wall Thickness(mm)

± Weight(kg/m)

+%10101010

12.512.510101010

12.512.512.512.515.012.512.512.512.512.512.515.012.515.0

-%-10-10-10-10-13-13-10-10-10-10-13-13-10-10

-12.5-10-10-10-10-10-10

-12.5-10

-12.5

-%235.100192.080288.700216.200178.350160.540321.070294.700267.220241.070204.000195.460346.000241.950193.550385.400351.500326.250270.000469.350370.000328.470486.790448.900

Tolerances

22SPECIAL STEELS

BRIGHT BAR

Bright Bar

23SPECIAL STEELS

(LOW CARBON, BRIGHT MILD STEEL)SPECIFICATION - SAE J 403(Also suitable for 080A15 bright mild steel)

BRIGHT BAR | SAE 1018

SAE 1018RED:

Cold drawn orpeeled bright bar

%MinMax

C0.150.20

Si0.150.35

Mn0.600.90

S-

0.050

P-

0.040


Size ranges offered

Expected mechanical properties*Drawn 1018/070M20 6 - 76.2mm

LRS(mm)

-

Hardness(BHN)

160 - 180

U.T.S.(MPa)

560 - 620

Y.S.(MPa)

440 - 520

0.2% P.S.(MPa)

-

Elongation(%)

15 - 22

Peeled 1018/070M20 80 – 160mm

LRS(mm)

-

Hardness(BHN)

120 - 160

U.T.S.(MPa)

430

Y.S.(MPa)

300

0.2% P.S.(MPa)

-

Elongation(%)35

Heat treatment• This steel normally not heat treated

Condition of delivery• Cold drawn, drawn & ground or peeled, depending on customer requirement• Straightness shall not exceed 1mm over any 1 000mm• Length tolerance is -0mm, + 100mm

*Expected Mechanical Properties to be used as a guide only

Max

(mm)68

101214

14.5151618

18.21920

21.8222425

25.4

Nominaldiameter

(mm)68

101214

14.5151618

18.21920

21.8222425

25.4

Calculatedweight(kg/m)0.2220.3950.6170.8881.2081.2961.3871.5781.9972.0422.2262.4662.8222.9843.5513.8533.977

Min

(mm)5.957.959.95

11.9513.9514.4514.9515.9517.9518.1518.9519.9521.7521.9523.9524.9525.35

Max

(mm)27.5283032

33.1353638404245485055606570

Nominaldiameter

(mm)27.5283032

33.1353638404245485055606570


8.9029.864

10.87512.48412.20415.41318.64922.19426.04730.209

Min

(mm)27.4527.9529.9531.9533.0534.9535.9537.9539.9541.9544.9547.9549.9554.8859.8864.8869.88

Max

(mm)7580859095

100105110115120125130140150160

Nominaldiameter

(mm)75

80*85*90*95*

100*105*110*115*120*125*130*140*150*160*

Calculatedweight(kg/m)34.67839.45644.54249.93755.64261.65

66.97274.59781.53688.77696.333

104.189120.84

138.713157.832

Min

(mm)74.8879.8884.8689.8694.8699.86

104.86109.86114.86119.86124.86129.8139.8149.8159.8

Typical usesShafts, bolts, studs, couplings & machinery components where low tensile strength material is required, etc.

*80mm nominal diameter and larger are in turned/peeled bar

24SPECIAL STEELS

(0.40%CARBON STEEL)SPECIFICATION - BS 970:Part1:1983(Formally known as EN 8 D - BS 970:1955)

BRIGHT BAR | 080A42

080A42YELLOW:


%MinMax

C0.400.45

Si0.100.40

Mn0.700.90

S-

0.050

P-

0.050


Size ranges for round bar offered

Expected mechanical properties*Drawn 080A42/EN8D 6 - 76.2mm

Heat treatment• Hardening - re-heat (austenizing) between 830°C and 860°C followed by quenching in oil• Tempering - generally between 550°C and 560°C depending on final hardness requirements

Condition of delivery• Cold drawn, drawn & ground or peeled depending, on requirement• Straightness shall not exceed 1mm over any 1 000mm• Length tolerance is -0mm, + 100mm

*≥ 80mm in peeled bar only. All sizes below 80mm in drawn bar

Max

(mm)689

10111214

14.5151618

18.21920

21.8222425

Nominal

diameter(mm)

689

10111214

14.5151618

18.21920

21.8222425

Calculated

weight(kg/m)0.2220.3950.4990.6170.7460.8881.2081.2961.3871.5781.9972.0422.2262.4662.8222.9843.5513.853

Min

(mm)5.9257.9258.9259.925

10.92511.92513.92514.42514.92515.92517.92518.12518.92519.92521.72521.92523.92524.925

Max

(mm)27.5283032

33.13536384042454850

50.855606570

Nominal

diameter(mm)27.5283032

33.13536384042454850

50.855606570

Calculated

weight(kg/m)4.6634.8335.5496.3136.7557.5527.9908.9029.864

10.87512.48415.41312.20415.91018.64922.19426.04730.209

Min

(mm)27.42527.92529.92531.92533.02534.92535.92537.92539.92541.92544.92549.92547.92550.6854.8859.8864.8869.88

Max

(mm)7580859095

100105110115120125130140150160

Nominaldiameter

(mm)75

80 *85 *90 *95 *

100 *105 *110 *115 *120 *125 *130 *140 *150 *160 *


104.189120.840138.713157.832

Min

(mm)74.8879.8884.8689.8694.8699.86

104.86109.86114.86119.86124.86129.84139.84149.84159.84

Peeled 080A42/EN8D 80 – 160mm

LRS(mm)

-

Hardness(BHN)

230 - 250

U.T.S.(MPa)

730 - 740

Y.S.(MPa)

680 - 720

0.2% P.S.(MPa)

-

Elongation(%)10

LRS(mm)

-

Hardness(BHN)

201

U.T.S.(MPa)

620

Y.S.(MPa)

415

0.2% P.S.(MPa)

-

Elongation(%)14


25SPECIAL STEELS

BRIGHT BAR | 080A42

Size range for hexagon bar offered

Max

(mm)10131719222425273032363841465055

Nominal sizeacross flats

10131719222425273032363841465055


11.43114.38917.00020.570

Min

(mm)9.91

12.9116.9118.8921.8923.8924.8926.8929.8931.8735.8737.8740.8745.8749.8754.84

Typical usesDynamo and motor shafts, heat treated bolts and studs, crankshafts, connecting rods, driving rings and flanges, railwaycouplings, axles, brackets, housings and parts not subject to high stresses or severe wear, etc.

26SPECIAL STEELS

(LOW CARBON RE-SULPHURIZED FREE-CUTTING STEEL)SPECIFICATION - BS 970:Part1:1983(Formally known as EN 1 A - BS 970:1955)

BRIGHT BAR | 230M07

230M07BLUE:


%MinMax

C-

0.15

Si0.100.40

Mn0.901.30

S0.250.35

P-

0.070


Size ranges for round bar offered

Heat treatment• Generally this steel grade is not heat treated

Condition of delivery• Cold drawn, drawn & ground or peeled depending on requirement• Straightness shall not exceed 1mm over any 1 000mm• Length tolerance is -0mm, + 100m

Max

(mm)68

1012141516181920

Nominaldiameter

(mm)68

1012141516181920


Min

(mm)5.957.959.95

11.9513.9514.9515.9517.9518.9519.95

Max

(mm)222528303235404550

Nominaldiameter

(mm)222528303235404550


12.48415.413

Min

(mm)21.9524.9527.9529.9531.9534.9539.9544.9549.95

Typical usesFor high speed production and/or repitition work where the major requirements are rapid machining and maximum tool life. Cutting speedson this grade are considerably higher than those of mild steels together with a far more superior surface finish.

Bushes, pins, shafts, bolts, nuts, studs, couplings and machinery components where low tensile strength material is required, etc.

Expected mechanical properties*Drawn 230M07/EN1A 6 – 50mm

LRS(mm)

-

Hardness(BHN)

126 - 180

U.T.S.(MPa)

460 - 550

Y.S.(MPa)

360 - 440

0.2% P.S.(MPa)

-

Elongation(%)

8 - 15


27SPECIAL STEELS

(LOW CARBON LEAD FREE - CUTTING STEEL)SPECIFICATION - SAE J403

BRIGHT BAR | SAE 12L14

SAE 12L14MAGENTA:

Cold drawnbright bar

%MinMax

C-

0.15

Si-

0.10

Mn0.851.15

S0.260.35

P0.0400.090

PB0.150.35


Size range for round bar offered Size range for hexagonal bar offered

Heat treatment• Generally this steel grade is not heat treated

Condition of delivery• Cold drawn condition only• Straightness shall not exceed 1mm over any 1 000mm• Length tolerance is -0mm, + 100mm

Max

(mm)8

1012131618202225283032

Nominaldiameter

(mm)8

1012131618202225283032


Min

(mm)7.959.95

11.9512.9515.9517.9519.9521.9524.9527.9529.9531.95

Max

(mm)13171922242527303236384146

5055

Nominaldiameter

(mm)13171922242527303236384146

5055


11.43114.389

17.00020.570

Min

(mm)12.9116.9118.8921.8923.8924.8926.8929.8931.8735.8737.8740.8745.87

49.8754.87

Typical usesFor high speed production and/or repitition work where the major requirements are rapid machining and maximum tool life. Cutting speedson this grade are considerably higher than those of mild steels as well as the sulphur free cutting steel grades together with a far moresuperior surface finish.

The lead addition however further impairs the mechanical properties and fabrication charateristics compared to the re-sulphurized freecutting steel grades such as a forgeable, formability and weldability.

Bushes, pins, shafts, bolts, nuts, studs, couplings and machinery components where low tensile strength material is required, etc.

28SPECIAL STEELS

HARDNESS CONVERSIONS

Hardness ConversionsConversion chart in accordance with ASTM A 370

Rockwell C150kg load

(Diamond cone indenter)

68676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120

Rockwell A60kg load

(Diamond cone indenter)

85.685.084.583.98.3482.882.381.881.280.780.179.679.078.578.077.476.876.375.975.274.774.173.673.172.572.071.570.970.469.969.468.968.467.967.466.866.365.885.364.864.363.863.362.862.462.061.561.060.5

Brinell3000kg load

(10mm diamond ball indenter)

---

739722706688670654634615595577560543525512496482468455442432421409400390381371362353344336327319311301294286279271264258253247243237231226

Vickers

(Pyramid indenter)

940900865832800772746720697674653633613595577560544528513498484471458446434423412402392382372363354345336327318310302294286279272266260254248243238

15 N scale15kg load

(Diamond indenter)

93.292.992.592.291.891.491.190.790.289.989.388.988.387.987.486.986.485.985.585.084.583.983.583.082.582.081.580.980.479.979.478.878.377.777.276.676.175.675.074.573.973.372.872.271.671.070.569.969.4

30 N scale30kg load

(Diamond indenter)

84.483.682.881.981.180.179.378.477.576.675.774.873.973.072.071.270.269.468.567.666.765.864.864.063.162.261.360.459.558.657.756.855.955.054.253.352.151.350.449.548.647.746.845.945.044.043.242.341.5

45 N scale45kg load

(Diamond indenter)

75.474.273.372.071.069.968.867.766.665.564.363.262.060.959.858.657.456.155.053.852.551.450.349.047.846.745.544.343.141.940.839.638.437.236.135.933.732.531.330.128.927.826.725.524.323.122.020.719.6

MPa or N.mm²

--------

2420233022402160207020101950188018201760170016401580152014801430139013401300125012201180114011101080105010301010970950930900880860850820810790770760

Tonnes/in²

--------

15715114514013413012612211811411010610298.596-

90878481-

76-

72-

68-

65-

61.6-

58-

55-

53-

51-

49

Hardness Superficial hardness Approximate tensile

Important note: The value in this table gives the interrelationship of hardness and approximate tensile strength of steels. It is possible that there may be deviations due to chemical compositionand processing histories. The values should be used for ferritic and martensitic steels only. This table should be used with caution.

Macsteel’s heat treatment plant is the largest, most diverse heat treatment plant in South Africa. The heat treatment plant is divided into two departments, each specialising in a unique heat treatment process range. The heat treatment plant control instrumentation is computer driven and is on par with similar systems anywhere in the world.

Batch processesAnnealingNormalizingSub-critical annealingStess relievingHarden and temper (both water and oil quench facilities)

Furnace and ancillary equipment used in the batch process• 8 off gas fired top hat furnaces that can handle up to 7m length bar stock• Water and oil quenching facilities• 2 straightening presses to straighten from 40mm dia to 320mm dia• 2 straightening reelers to straighten 16mm dia to 40mm dia• 1 Pit furnace - electrically fired - neutral hardening and tempering• Cryogenic freezing facilities

Continuous processesNeutral hardeningAustemper process

Furnace and ancillary equipment used in the continuous process• 2 off gas fired shaker hearth furnaces• 1 off electrical shaker furnace• Batch tempering furnace• 1 austemper furnace

29SPECIAL STEELS

HEAT TREATMENT PROCESS RANGE

Heat Treatment Process Range

The reasons for doing heat treatmentHeat treatment of steel or components is usually intended to accomplish any one of the following objectives:• to obtain the desired properties within a given steel• to remove stresses in steel/components set up by cold working or to remove stresses set up by non-uniform cooling of hot metal objects• to refine the grain structure (a course grain sie may result in premature cracking when the component is put into use)• to decrease the hardness and increase ductility• to increase the hardness so as to increase resistance to wear• to increase the toughness (the ability of a material to absorb energy & deform platically before fracturing); that is to produce steel or a component having both high tensile strength and good ductility• to improce the machinability• to improve the electrical & magnetic properties

30SPECIAL STEELS

HEAT TREATMENT OF STEELS

Heat Treatment of Steels

31SPECIAL STEELS

HEAT TREATMENT PROCESSES

Heat Treatment Processes

Full annealing

The purpose of full annealing may be to refine the grain, induce softness, improve electrical and/or magnetic properties and in some cases to improve machinability. The process consists of controlled heating to a suitable temperature, above transformation temperature (normally above 850°C) holding for sufficient time and then controlled cooling within the furnace.

Sub-critical annealing, stress relieving:The purpose of this treatment is primarily used for the removing of residual stresses introduced as a result of extensive cold working or extensive machining.

Normalizing

The purpose of normalizing is to supply harder and stronger steel than full annealing. It may also be used to improve machinability, modify, refine and homogonise the grain structure to improve the response in further hardening operations. The process is similar to full annealing. The main difference is that the components are cooled in still air.

Hardening

The hardening process is done to increase mechanical properties to specific requirements. The process may be modified to supply a full through hardened component or a hard surface with a softer, tougher one.

Tempering

Tempering is done as a necessary add on heat treatment after hardening. The process of tempering is to minimise the stresses induced by the quenching process. Its purpose is two-fold, to prevent cracking (high allow/tool steels) and to achieve desired hardness levels.

Austempering

Austempering is applied to components requiring high hardness coupled with high impact resistance and greater ductility that can be achieved with a quench and temper. The process is achieved by hearing the components to above the transformation temperature (normally 820°C to 880°C) and quenching into a salt bath of about 220°C to 400°C.

32SPECIAL STEELS

HEAT TREATMENT FURNACES UTILISED

Heat Treatment Furnaces utilised

The heat treatment processes can be performed in one or more furnace types. The selection of a furnace type is dependant on the process required, the size of the component/length of steel and the surface finish required.

Pit retort furnaces

Processes normally carried out are neutral hardening. Annealing and normalizing under protective atmosphere can also be done. The furnaes use protective atmospheres in the processes.

Specialised heat treatmentAustemper furnace (continuous line process)This is a continuous belt fed furnace used for hardening (austempering) small components under a protective atmosphere. The components are moved along a belt through the hot atmosphere controlled zone and dropped into a molten salt bath. The components move through the salt bath on a conveyer into a washer and drier resulting in a complete and final product

Shaker hearth furnaces (continuous line process)

These furnaces are specifically designed for neutral hardening under protective atmosphere of small, high volume articles (e.g. fasteners, nails, and springs).

Top hat furnaces

As the name implies, these large box-type furnaces are placed on a bed which has steel billets/bars or components laid out on them. Heat treatement processes include stress relieveing, normalizing, annealing and quench & temper. These furnaces are typically used in the heat treatment of small through to large items such as forging, fabrications, bar stock whcih has been purchased in the untreated condition and castings. The atmosphere is not controlled, so some oxidation does occur. This is not normally serious as further machining is done on these components.

33SPECIAL STEELS

METALLURGICAL SERVICES

Metallurgical ServicesThe Macsteel Metallurgical Services Division (MSD) has been set up as an aid to both the Special Steels division and the heat treatment division. The MSD department also does work for outside customers.

The MSD laboratory performs the following services

Chemical analysis, tensile testing, impact testing, non-destructive testing, macro & microscopic evaluation, hardness tests (Brinell, Rockwell and micro hardness testing), case depth evaluation, grain size & cleanliness evaluation, failure investigations and reports, metallurgical advice, controls ISO Accreditation.

Spectrographic chemical analysis determination

The department has two instruments at its disposal, one ARL 3360 laboratory instrument capable of analyzing for C, Si, Mn, S, P, CR, Ni, Mo, Cu, V, Al and Ti and one Spectrotest mobile instrument capable of analyzing for C, Si, Mn, S, P, CR, Ni, Mo, Cu, V, Al, Sn, As and B at virtually any site where accessable.

Chemical analysis service include product identification, sorting, verification, etc. of components, stock in virtually any form.

Typical steel grades that can be analyzed either for identification and/or verification are:Carbon steels including hollow bar: 070M20 (EN 30A), 080M40 (EN 8), 070M55 (EN 9), 150M19 (EN 14B), St 52, SAE 1020Alloy steel: 709M40 (EN 19), 817M40 (EN 24), 826M40 (EN 26), 835M15 (EN 39B), 835M30 (EN 30B), K0006, 655M13 (EN 36)Tool steel: D2 (1.2379), H13 (1.2344), S1 (1.2542), O1 (1.2510), L6 (1-2714), D6 (1-2436)Stainless steel: SAE/AISI 304, SAE/AISI 316, SAE/AISI 420, SAE/AISI 430

Mechanical testing

Tensile testing with a 300kN SERVO Hydraulic universal machine on standard and sub size test pieces as well as many different components with th aid of custom designed grips. Impact testing of ‘Charpy’ or ‘Izod’ specimens and can be done from room temperature (20°C) down to -189°C. Brinell hardness measurements can be performed on virtually any component on site and off site. Rockwell, Vickers and Micro-Vickers hardnesses can be done on suitably prepared components and samples where necessary.

Non-destructive testing

Ultrasonic testing of any product can be performed by qualified SNT-TC-1A Level 2 technician/s on request. Testing can be done to specific customer requiremnts on site, prior to processing, after heat treatment, after processing and in special cases off site. Typical testing is done on round and square bar after heat treatment, prior to machining and after rough machining (to the more stringent specification). Specifications generally utilized is AAC 999/6, AQL level 1, 2 & 3, etc.

Failure investigations & metallurgical evaluations

A laboratory equipped with two optical light microscopes, micro-hardness tester, low power stereo mocroscope, Rockwell hardness tester, sample preparation machines, etc. enables the metallurgical services department to provide a full metallurgical service not only to the heat treatment and sales and marketing departments but also to customers and end-users in the steel and engineering industry.

Services provised are, among many others:• Micro-hardness testing • Metallographic examination and evaluation of materials and products• Case hardness determination • Metallurgical investigations and evaluations of failures• Microstructure determination and evaluation • Material/steel grade classification, verification and validation• Technical information and support

34SPECIAL STEELS

GLOSSARY OF METALLURGICAL TERMS

Glossary of Metallurgical TermsA

Age hardeningHardening by ageing, usually after rapid cooling in water (quenching or spraying).

Ageing (metal or alloy)A change in properties (hardness and strength) that occurs slowly at room temperature or elevated temperatures.

Air hardeningTerm describing steel containing enough carbon or alloying elements to harden fully during cooling in air or other gaseous mediums from a temperature. Above the transformation range.

AlloyA substance having metallic properties and being composed of two or more chemical elements of which at least one is an elemental metal.

AnnealingThe heating to and holding at a suitable temperature and then cooling at a suitable rate, for such purposes as reducing hardness, improving mechinability, facilitating cold working, producing a desired microstructure, or obtaining desired mechanical, physical or other properties. If the sole purpose is to reduce stresses, the term is stress relieving.

AustemperingA heat treatment generally applied to steels and cast (ductile) irons by quenching into a medium from above the transformation temperature range that has a heat extraction rate high enough to allow the formation of acicular ferrite and high carbon stabilized austenite (ausferrite) but low enough to prevent the

formation of martensite and high enough to prevent the formation of pearlite and holding the product at that temperature to allow complete transformation to take place.

Austenite A solid solution of one or more elements in face-centred-cubic iron. The solute is generally assumed to be carbon.

B

Bainite A decomposition product of austenite consisting of an aggregate of ferrite and carbide. In general it forms at temperatures lower than those at where very fine pearlite forms and higher that where martensite begins to form on cooling. Its appearance is feathery if formed at the upper part of the temperature range and acicular, resembling matensite if formed in the lower part.

Bend test A test for determining the relative ductility, soundness and toughness of metal that is to be formed (usually plate, wire, strip or sheet). The specimen is bent over a specified diameter, through a specific angle.

Blowhole A hole on a casting or a weld caused by gas entrapped during solidification.

Brinell hardness test A test for determining the hardness of a material by forcing a hard steel or cabide ball of specified diameter into it under a specific load. The result is expressed as the Brinell hardness number, which is the value obtained by dividing the applied load in kg by the surface area of the rsulting impression in mm².

Burning (1) permanenty damaging a metal or alloy by heating to cause either incipient melting or intergranular oxidation. (2) in grinding, getting the work hot enough to cause discolouration or to change the microstructure by tempering or hardening.

C

CarbideA compound of carbon with one or more metallic elements.

Carbonitriding Introducing carbon and nitrogen (simultaneously) into a solid ferrous alloy by holding above the lower critical line (720°C) for a suitable perios of time to allow for adequate diffusion of the carbon and nitrogen. The carbonitrided alloy is usually quenhc hardened.

Carbon steel Steel containing up to 2% carbon and only residual quantities of other elements, except those added for deoxidation, with silicon usually limited to 0.60% and manganese to about 1.65%.

35SPECIAL STEELS


CarburizingIntroduction of carbon into a solid ferrous alloy by holding above 720°C in a carbon rich atmosphere for a time period long enough for adequate carbon penetration. The carburised component is normally quench hardened.

Case hardeningHardening a ferrous alloy so that the outer portion or case is substantially harder than the core. Typical processes are carburising, nitriding, carbo-nitriding, nitro-carburising, flame hardening and induction hardening.

Charpy testA pendulum type single-blow impact test in which the specimen, usually notched is supported at both ends as a simple beam and broken by a falling pendu-lum. The energy absorbed as determined by the subsequent rise of the pendulum, is a measure of impact strength or notch toughness.

D

DecarburizationThe loss of surface carbon in a ferrous alloy as a result of heating in a medium that reacts with the carbon at the surface.

F

FatigueThe phenomenon leading to the fracture under repeated or fluctuating stresses having a maximum value less than the tensile strength of the material. Fatigue fractures are progressive, beginning as small cracks that grow under the fluctuating stress.

FerriteA solid solution of one or more elements in body-centric-cubic iron. Unless otherwise stated, the solution is generally assumed to be carbon.

Flame hardeningA quench hardened component, where the heat is applied from a direct flame.

Full annealingAnnealing a ferrous alloy by heating it into the austenite range, holding it for a sufficient time and then cooling it slowly through the transformation range.

G

Grain growthAn increase in the size of the grains in polycrystalline metal, usually effected during heating at elevated temperatures. The increase may be gradual or abrupt, resulting in either uniform or non-uniform grains after growth has ceased.

Grinding cracksShallow cracks formed on the surface of realtively hard materials because of excessive grinding heat or the high sensitivity of the material.

H

HardenabilityIn ferrous alloy, the property that determines the depth and distribution of the hardness introduced during quenching.

HardeningIncreasing the hardness by suitable treatment, usually involving heating and cooling. The more specific terms should be used: age hardening, case hardening, induction hardening, etc.

HardnessThe resistance of a metal to plastic deformation, usually by indentation. Common hardness tests are Brinell, Rockwell, Knoop and Vickers hardness.

Heat treatmentHeating and cooling a solid metal or alloy in such a way as to obtain desired conditions or properties. Heating for the sole purpose of hot working is excluded fron the definition.

Homogenizing treatmentA heat treatment of an alloy intended to make it uniform in composition by eliminating coring and concentration gradients.

I

Impact testA test to determine the behaviour of metals when subjected to high rates of loading, usually in bending, tension o r torsion. The quantity measured in the energy absorbed in breaking the specimen by a single blow, as in the Charpy or Izod tests.

Induction hardeningQuench hardening in which the heat is generated by electrical induction.

36SPECIAL STEELS


M

MartemperingQuenching an austenitised ferrous alloy in a medium at a temperature in the upper part of the martensite range, or slightly above that range, and holding it in the medium until the temperature throughout the alloy is substantially uniform. The alloy is then allowed to cool in still air through the martensite range.

MartensiteA metastable phase of steel, formed by the transformation of austenite below the Ms temperature. It is an interstitial supersaturated solid solution of carbon in iron having a body-centred-tetragonal lattice. its microstructure is characterised by an acicular or needlelike pattern.

Mechanical propertiesThe properties of a metal that reveal its elastic and inelastic behaviour where force is applied, thereby indicating its suitability for mechanical applications. Examples are tensile strength, yield strength, elongation and hardness.

N

NitridingIntroducing nitrogen into a ferrous alloy by holding at a suitable temperature (below 720°C for ferritic steels) in contact with a nitrogenous material such as ammonia or molten cyanide. Quenching is not required for hardening.

NormalizingHeating a ferrous alloy to a suitable temperature above the transformation range and then cooling in air to a temperature substantially below the transformation range.

P

Process annealingIn the sheet and wire industries, heating a ferrous alloy to a temperature close to, but below the transformation range and then cooling, in order to soften the alloy for further cold working.

Q

Quench hardening (quenching)Hardening a ferrous alloy by austenitizing and the cooling rapidy enough so that some or all of the austenite transforms to martensite.

R

Residual stressStress present in a body that is free of external forces or thermal gradients.

S

Secondary hardeningTempering certain alloys at a certain temperature so that the resulting hardness is higher than it would be if it were tempered at a lower temperature.

Solution heat treatmentHeating an alloy to a suitable temperature, holding at that temperature long enough to allow one or more constituents to enter solid solution, and the cooling rapidly enough to hold those consituents in solution. The alloy is left in a supersaturated, unstable state.

SpheroidizingHeating and cooling to produce a spheroidal or globular form of carbide in steel.

T

TemperTo reheat hardened steel to some temperature below the transformation range for the purpose of reducing the hardness and increating the toughness. The process is also sometimes applied to normalized steel.

ToughnessThe ability of the material to absorb energy and deform plastically before fracturing.

37SPECIAL STEELS

FACT SHEET ON ALLOYING AND ACCOMPANYING ELEMENTS IN STEEL

Fact Sheet on Alloying and Accompanying Elements in SteelAI - AluminiumThis is the most powerful de-oxidiser used which also combines with nitrogen, thereby reducing the susceptibility to strain ageing. Small additions assist fine-grained structure. As aluminium forms very hard nitrides with nitrogen, it is usually an alloying element in nitriding steels. Aluminium improves the scale resistance and is therefore often used as an alloying element in ferritic heat resisting steels.

C - CarbonCarbon is the most important and influential element in steel. In addition to Carbon every unalloyed steel contains Silicon, Manganese Phosphorus and Sulphur which occur unintentionally during manufacture. In addition to further alloying elements to achieve special effects and intentionally increase Manganese and Silicon content, results in alloy steel. With increased Carbon content the strength and hardenability of steel increase but its ductility, forgeability and machineability reduces. The carbon content in steel has virtually no effect on the steels corrosion resistance to water, acids and hot gasses.

Cr - ChromiumChromium increases the hardenability of steel while the ductility is effected minimally. Higher Chrome content in steel increases its corrosion resistance, and by forming carbides the edge holding quality of steel increases. The tensile strength of steel increases by 8 - 100 N/mm² for every 1% Chrome added. The yield strength also increases but the notch impact value reduces.

Mn - ManganeseManganese increases the strength of steel to a lesser degree than Carbon while it favourably influences the forgeability, weldability and markedly increases the hardness penetration depth.

Mo - MolybdenumWhile Molybdenum improves the tensile strength and increases the heat resistance and weldability of steel, the forgeability of steel with high molybdenum, content decreases. When used in combination with Chromium and Nickel, Molybdenum may produce high yield points and tensile strength values.

Ni - NickelBy adding Nickel to steel the notch toughness is increased significantly and is therefore alloyed for increasing toughness in case-hardening, heat-treatable and subzero toughness steels. Nickel combined with Chromium ensures good through hardening. Chrome-Nickel steels are Stainless, heat resistant and resistant to scaling. Nickel does not impair the welding properties of steel.

P - PhosphorusPhosphorus is normally regarded as being detrimental to steel and every endeavour is therefore made to keep Phosphorus content in high grade steels to a maximum of 0.03 to 0.05%.

Pb - LeadLead is added in free cutting steels in amounts of 0.20 - 0.50%. Because of its fine homogenous distribution, formation of shorter chips and clean faces of cut is achieved, thus improving machineability. The stated Lead content does not affect the mechanical properties of the steel.

S - SulphurSulphur produces the most pronounced segregation of all steel accompanying elements. It leads to red shortness or hot shortness. Sulphur is added to steels for automatic machining in quantities of up to 0.40%. This reduces the friction on the tool cutting edges by means of lubricating action, therefore increasing tool life. It also produces shorter chips during machining. Sulphur also increases susceptibility to welding cracks in steel.

Si - SiliconSilicon, like Manganese is contained in all steel as iron ore contains Silicon in various quantities, depending on overall composition. Silicon is absorbed from the furnace refractory linings during the melting process. However, only steels containing more than 0.40% of Silicon are called Silicon steels. Silicon is a deoxidiser and promotes graphite precipitation, it also increases the strength and wear resistance of steel while significantly increasing the elastic limit, thus being a useful alloying element in spring steels. Because of Silicons ability to greatly reduce electrical conductivity, extensive use is made of it in electrical steels.

V - VanadiumVanadium us used as a primary grain refiner in the manufacture of steel. It is also a strong carbide former, thus providing increased wear resistance, edge holding and high temperature strength. Vanadium is therefore used primarily as an alloying element in high speed, hot forming and creep resistant steels.

38SPECIAL STEELS

ABBREVIATIONS

AbbreviationsAnnNHTQTHBHRCHRBHVU.T.S.Y.S.0.2% P.S.Elong. (%)JKVCMPaN.mm21 MPammmARAFkg/m

AnnealedNormalizedHeat treatedQuenched and temperedBrinell hardness (10mm ball, 3000kg load)Rockwell hardness, C scale, 150kg load)Rockwell hardness, B scale, 100kg load)Vickers hardnessUltimate tensile strength (Rm)Yield strength (Re)Proof stress offset at 0.2 percent (Rp 0.2)Percentage of elongation [A on 5.65√ so where so = original cross sectional area]Joules (energy absorbed during impact testing)Charpy impact strength (”v” notch)MegapascalNewton per square millimetre1 N.mm2MillimetreMetreAs hot rolledAs hot forgedKilogram per metre

39SPECIAL STEELS

ACCREDITATION

Accreditation

40SPECIAL STEELS

ACCREDITATION

41SPECIAL STEELS

ACCREDITATION

September 2021

DUNSWART

Lea Rd, Dunswart, BoksburgPO Box 6130, Dunswart, 1508

Tel: 011 897 5000Fax: 011 918 1125

email: [email protected]

KZN

30 Goodwood Rd, Westmead Ext, PinetownPO Box 10589, Ashwood, 3605

Tel: 031 791 3400Fax: 086 679 2236


MEYERTON - BRIGHTBAR

Seymour Rd, Industrial Sites, MeyertonPO Box 120, Meyerton, 1960

Tel: 016 360 1300 / 1340Fax: 016 362 3480


www.macsteel co.za

Macsteel Special Steels is able to source a wide range of specifications from our local and international network of suppliers. Should you require any specifications not mentioned in our technical guide feel free to contact our metallurgical department

or sales team for further assistance.

specialsteels catalogue may2021 colourcorrect

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