TOLERANCES

WIRE RODS TOLERANCES

Diameter (mm) Tolerance (mm) Diameter (mm)

Wire rod in free cutting steels, case hardening steels, steels for

quenching and tempering, steels for surface hardening, stainless steel

Tolerances in accordance to EN 10017: 2004

Wire rod in steels for cold heading and cold extrusion

Tolerances in accordance to EU 108-72 grade A - UNI 7356-74

5,0

10,0

16,0

26,0

40,0

9,5

15,5

25,0

39,0

50,0

±0,3

±0,4

±0,5

±0,6

±0,8

5,50

10,50

16,00

22,00

10,00

15,50

21,50

30,00

±0,25

±0,30

±0,35

±0,40

from to from to

Tolerance (mm)

HOT ROLLED ROUND BARS ROUNDNESS TOLERANCES (EN 10060: 2003) The roundness or ovality error is the difference between the bigger and the smaller diameter of the same section. It shall be measured at least 100 mm from the ends of the bar and shall not exceed over 75% of tolerance on diameter.

WIRE RODS ROUNDNESS TOLERANCES (EN 10017: 2004) The roundness or ovality error is the difference between the bigger and the smaller diameter of the same section. It shall be measured at least 100 mm from the ends of the bar and shall not exceed over 80% of tolerance on diameter.

Diameter

(mm)

Normal

tolerance (mm)

Diameter

(mm)

Normal

tolerance (mm)

Diameter

(mm)

Normal

tolerance (mm)

Diameter

(mm)

Normal

tolerance (mm)

10

12

13

14

15

16

18

19

20

22

24

25

26

27

28

±0,4

±0,5

±0,6

±0,6

±0,8

±1

±1

±1,3

±1,5

±2

±2

±2,5

±3

±4

30

32

35

36

38

40

42

45

48

50

52

55

60

63

65

70

73

75

80

85

90

95

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

175

180

190

200

220

250

HOT ROLLED ROUND STEEL BARS DIAMETER TOLERANCES (EN 10060: 2003)

The bar diameter, measured at any point situated at least 100 mm from the end of the bar, shall be in accordance to the tolerances of the schedule.Cold shearing may deform the bars ends. The condition of the ends may be agreed at time of inquiry and order.

Note: the straightness shall be measured along the total lenght of the bar.

HOT ROLLED ROUND BARS STRAIGHTNESS TOLERANCES (EN 10060: 2003)Nominal diameter (mm)

d ≤ 25

25 < d ≤ 80

80 < d ≤ 250

Tolerance (mm)

Not established

q ≤ 0,4% di L

q ≤0,25% di L

Hot rolled products tolerances

q

L

TOLERANCES

BRIGHT STEEL PRODUCTS CLASSES TOLERANCES (EN 10278: 2002)

Delivery conditionh7

Tolerance class according to ISO 286-2

h8 h9 h10 h11 h12

Cold drawn

Turned

Ground

-

-

R

-

-

R

R

R

R

R

R

R

R - H - S

R

R

R - H - S

R

R

R= Round; H= Hexagon; S= Square.The dimensional tolerances shall be chosen among those allowed in the table.

Bright bars tolerances

tofrom

Nominal dimension (mm)h7 h8 h9 h10 h11 h12 k13*

1

3

6

10

18

30

50

80

120

180

3

6

10

18

30

50

80

120

180

200

0,010

0,012

0,015

0,018

0,021

0,025

0,030

0,035

0,040

0,046

0,014

0,018

0,022

0,027

0,033

0,039

0,046

0,054

0,063

0,072

0,025

0,030

0,036

0,043

0,052

0,062

0,074

0,087

0,100

0,115

0,040

0,048

0,058

0,070

0,084

0,100

0,120

0,140

0,160

0,185

0,060

0,075

0,090

0,110

0,130

0,160

0,190

0,220

0,250

0,290

0,100

0,120

0,150

0,180

0,210

0,250

0,300

0,350

0,400

0,460

+0,14

+0,18

+0,22

+0,27

+0,33

+0,39

+0,46

+0,54

+0,63

+0,72

*= Field not included in EN 10278.For h tolerance the dimensions are all below the nominal dimensions. The maximum value corresponds to the nominal dimension, while the field amplitude of tolerance is listedin the table.Actual dimension of the bar shall be measured at least 150 mm from the end of the bar, in accordance to EN 10278.The table includes also the K13 tolerance, which RODACCIAI uses for rough turned stainless steel products (1X process route). This deviation is over the nominal dimension.

BRIGHT STEEL BARS RODACCIAI STANDARD DIMENSION TOLERANCES

Dimensional

tolerancesh10 h11 h10 h9

Cold drawn - RoundCold drawn hexagon

and squareTurned Ground

If not differently agreed at time of inquiry and order, the dimension tolerances for bright steel bars shall be in accordance to values provided in table.

BRIGHT STEEL BARS DIMENSION TOLERANCES (EN 10278: 2002)

TOLERANCES

This is a general table, it is therefore recommended to specify the tolerances required at time of order.

Diameter (mm)

0,112÷0,17

0,18÷0,27

0,28÷0,44

0,45÷0,70

0,71÷1,00

Tolerance

min

-0,004

-0,006

-0,008

-0,010

-0,015

max

+0,004

+0,006

+0,008

+0,010

+0,015

BRIGHT STEEL BARS STRAIGHTNESS TOLERANCES (EN 10278: 2002)

Product form Steel group

Rounds

< 0,25%C

≥ 0,25%C

alloy steels

quenched and tempering steels

stainless steels

tool steels

< 0,25%C

≥ 0,25%C

alloy steels

quenched and tempering steels

stainless steels

tool steels

< 0,25%C

≥ 0,25%C

alloy steels

quenched and tempering steels

stainless steels

tool steels

Nominal diameter (mm) Deviation max (mm)

d ≤75 mm

d ≤75 mm

d >75 mm

d >75 mm

d ≤75 mm

d >75 mm

1,0

1,5

1,0

2,0

1,5

2,5

Squares and hexagons

1,0

1,0

1,5

BRIGHT STEEL BARS OUT-OF-ROUND TOLERANCES (EN 10278: 2002) Maximum deviation from out-of-round shall be no more than half the specified tolerance and in any case never above the upperlimit of tolerance.

Unless otherwise specified, the tolerances of this table will be applied.

TOLERANCES FOR WIRE PRODUCTS (DIN 1782-93)

Tolerance for wire products