Ruukki is a metal expert you can rely on all the way, whenever you need metal based materials, components, systems or total solutions. We constantly develop our product range and operating models to match your needs.

Hot rolled steel plates, sheets and coilsStandard steel gradesComparison, designations and codes

Raahe Works manufactures steel grades that are in compliance with the European EN standards and other international standards. Standard steel grades are manufactured in plates and sheets, coil products and shop-primed plate products. To meet our customers’ needs, we can also deliver plates and sheets with a number of prefabrications such as cut to shape, bent and with edge bevels. This data sheet contains information on the most common structural and pressure equipment steels in compliance with EN standards. Further information on our standard steel grades is available in the following data sheets.

Further information• Plate products, Production programme• Coil products, Production programme• Dimensional and shape tolerances• Shop primed plates• Prefabrications data sheets• Inspection documents

HR 2.3.02 01.20101

Standard steel grades. Comparison, designations and codes

The structural and pressure equipment steels manufac-tured in compliance with the European EN standards are either “non-alloyed” or “alloyed” steels in accordance with standard EN 10020. These steels are divided into “quality steels” and “special steels”.

• Standard steel management standards EN 10020:2000

“Definition and classification of grades of steel” EN 10027-1:2005 “Designation systems for steels. Part 1: Steel names”

EN 10027-2:1993 “Designation systems for steels. Part 2: Numerical systems”

EN 10204-2004: “Metallic products. Types of inspection documents”

• Structural steels complying with the standardThe standard series EN 10025 Parts 1–6 defines Euro-pean hot-rolled structural steels. Ruukki Raahe Works is authorised to grant the European CE marking to steel grades that are in compliance with standards EN 10025-2, -3, -4 and -5 as well as to the steel grade S690 QL EN 10025-6. The CE marking is marked on an extra page of the inspection certificate.

EN 10025–1-2004: “Hot rolled products of structural steels. Part 1: General technical delivery conditions”

EN 10025–2-2004: “Hot rolled products of structural steels. Part 2: Techni-cal delivery conditions for non-alloy structural steels”

Table 1 shows the EN 10025–2 non-alloy structural steels and their approximate comparison with previous standard steels. Table 2 gives the impact strength of the steel grades and Table 3 their designations and mark-ings.

EN 10025–3-2004: “Hot rolled products of structural steels. Part 3: Techni-cal delivery conditions for normalized/normalized rolled weldable fine grain structural steels”

EN 10025–4-2004:“Hot rolled products of structural steels. Part 4: Techni-cal delivery conditions for thermomechanical rolled weldable fine grain structural steels”

EN 10025–5-2004:“Hot rolled products of structural steels. Part 5: Techni-cal delivery conditions for structural steels with improved atmospheric corrosion resistance”

EN 10025–6+A1:2009: “Hot rolled products of structural steels. Part 6: Techni-cal delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition”

• High-strength standard steels for cold formingEN 10149–2-1996: “Hot-rolled flat products made of high yield strength steels for cold forming. Part 2: Deliv-ery conditions for thermomechanically rolled steels”

• Structural pressure equipment steels complying with the standard

The quality management system of Raahe Works is cer-tified in accordance with the requirements of the Pres-sure Equipment Directive (PED). Ruukki can therefore give an inspection certificate that is in compliance with PED for EN pressure equipment steels if agreed upon when making the order. The inspection certificate is then marked with the following code: EN 10204:2004-3.1/PED 97/23/EC.

EN 10028-1+A1:2009: “Flat products made of steels for pressure purposes. Part 1: General requirements”

EN 10028–2-2009: “Flat products made of steels for pressure purposes. Part 2: Non-alloy and alloy steels with specified elevated temperature properties”

EN 10028–3-2009: “Flat products made of steels for pressure purposes. Part 3: Weldable fine grain steels, normalized”

EN 10028–4-2009: “Flat products made of steels for pressure purposes. Part 4: Nickel alloy steels with specified low temperature properties”

EN 10028–5-2009: Flat products made of steels for pressure purposes. Part 5: Weldable fine grain steels, thermomechanically rolled”

22

Standard steel grades. Comparison, designations and codes

Ruukki Raahe Works does not manufacture quenched and tempered steels in accordance with standard EN 10028 Part 6 or stainless steels for pressure pur-poses in accordance with Part 7 of the same standard.

• Standard steels for simple pressure vesselsEN 10207-2005: “Steels for simple pressure vessels. Technical delivery requirements for plates, strips and bars”

Table 4 shows the pressure equipment steels in compli-ance with standards EN 10028–2 and -3, and EN 10207 and approximate comparison with previous standard steels. In addition, Table 4 indicates impact strength values as well as designations and markings of these steels.

33

Standard steel grades. Comparison, designations and codes

• Non

allo

y st

ruct

ural

ste

els

EN 1

0025

-2:2

004,

ste

el g

rade

s Ta

ble

1M

echa

nica

l pro

pert

ies

and

appr

oxim

ate

com

paris

on w

ith p

revi

ous

stan

dard

ste

els

Yiel

d

stre

ngth

1)

ReH

MP

a

Tens

ile

stre

ngth

Rm

MP

a

Impa

ct

stre

ngth

1)

EN

100

25-2

2004

EN

100

25:1

990

+A1:

1993

EN

100

25:

1990

SFS

200

1986

S

S x

x xx

xx-

xx19

87

DIN

171

0019

80B

S 4

360

1986

NF

A 35

-501

1981

KV

Jt °

C23

536

0-51

027

20

–S

235J

RFe

360

B–

14 1

3 11

-00

St 3

7-2

E 2

4-2

235

360-

510

27 2

0S

235J

RS

235J

RG

2Fe

360

B F

NFe

37

B14

13

12-0

0R

St 3

7-2

40 B

–

235

360-

510

27 0

S23

5J0

S23

5J0

Fe 3

60 C

–

St 3

7-3

U40

CE

24-

3

235

360-

510

27-2

0S

235J

2+N

S23

5J2G

3Fe

360

D1

Fe 3

7 D

St 3

7-3

N40

DE

24-

4

235

360-

510

27-2

0S

235J

2S

235J

2G4

Fe 3

60 D

2–

–

275

430-

580

27 2

0S

275J

RS

275J

RFe

430

B

Fe 4

4 B

14 1

4 12

-00

St 4

4-2

43 B

E 2

8-2

275

430-

580

27 0

S27

5J0

S27

5J0

Fe 4

30 C

–

St 4

4-3

U43

CE

28-

3

275

430-

580

27-2

0S

275J

2+N

S27

5J2G

3Fe

430

D1

Fe 4

4 D

14 1

4 14

-00

St 4

4-3

N43

DE

28-

4

275

430-

580

27-2

0S

275J

2S

275J

2G4

Fe 4

30 D

2–

14 1

4 14

-01

–

355

510-

680

27 2

0S

355J

RS

355J

RFe

510

B–

(14

21 7

2-00

)–

50 B

E 3

6-2

355

510-

680

27 0

S35

5J0

S35

5J0

Fe 5

10 C

Fe 5

2 C

St 5

2-3

U50

CE

36-

3

355

510-

680

27-2

0S

355J

2+N

S35

5J2G

3Fe

510

D1

Fe 5

2 D

(12

21 7

4-01

)S

t 52-

3 N

50 D

355

510-

680

27-2

0S

355J

2S

355J

2G4

Fe 5

10 D

2–

–

355

510-

680

40-2

0S

355K

2+N

S35

5K2G

3Fe

510

DD

1–

–50

DD

E 3

6-4

355

510-

680

40-2

0S

355K

2S

355K

2G4

Fe 5

10 D

D2

––

185

310-

540

––

S18

5S

185

Fe 3

10-0

Fe 3

314

13

00-0

0S

t 33

A 33

295

490-

660

––

E29

5E

295

Fe 4

90-2

Fe 5

014

15

50-0

0S

t 50-

2A

50-2

Mat

eria

l thi

ckne

ss ≤

16 m

m.

1) T

he y

ield

stre

ngth

(ReH

) and

impa

ct s

treng

th (C

harp

y V

) val

ues

are

min

imum

val

ues.

For a

ccur

ate

com

paris

on, t

he o

rigin

al s

tand

ards

and

dat

a sh

eets

mus

t be

used

.

44

Standard steel grades. Comparison, designations and codes

• Non alloy structural steels EN 10025-2:2004 Table 2Impact strength, impact strength classes, codes and comparison with previous standards

Test temperature°C

Impact strength class

EN 10027:2005 EN 10025-2:2004 EN 10025:1990

Impact strength, longitudinally Impact strength, longitudinally Impact strength, longitudinally

27 J 40 J 60 J 27 J 40 J 27 J 40 J

20 JR KR LR JR – B –0 J0 K0 L0 J0 – C –

-20 J2 K2 L2 J2 K2 D DD-30 J3 K3 L3 – – – –-40 J4 K4 L4 – – – –-50 J5 K5 L5 – – – –-60 J6 K6 L6 – – – –

• Non alloy structural steels EN 10025-2 Table 3Symbols included in designationsSteel grade codes in the current and the previous standard

EN 10025-2:2004Symbol Comment

S Structural steelE Steel for engineering purposesC Guaranteed flangeability+N Delivery condition as normalized or

normalized rolledTo be delivered in delivery condition +N

+AR Delivery condition as untreated To be delivered in delivery condition +AR (As Rolled)Deoxidation

FN Rimming steel not permitted JR and J0 flat productsFF Fully killed with nitrogen binding elements J2 and K2 flat products

EN 10025:1990 + A1:1993Symbol G Comment

G1 Rimming steel, FU Delivery condition as chosen by the manufacturer unless otherwise agreed

G2 Rimming steel not permitted, FN Delivery condition as chosen by the manufacturer unless otherwise agreed

G3 Fully killed with nitrogen binding elements, FF Delivery condition as normalized or normalized rolledG4 Fully killed with nitrogen binding elements, FF Delivery condition as chosen by the manufacturer

55

Standard steel grades. Comparison, designations and codes

• Steels for pressure equipment Table 4Steel grades and designations and approximate comparison with previous standards

Steels for simple pressure vessels

High-temperature non-alloyed and alloyed steels Normalised weldable fine-grained steels

EN 10207:2005 EN 10028-2:2009 Comparison, approximate EN 10028-3:2009 Comparison, approximateDIN 17155 SS

xx xx x-xxDIN 17102 SS xx xx xx-xx

P235S P235GH H I 14 13 31-xx P275NH WStE 285

P265S P265GH H II 14 14 31-xx P275NL1 TStE 285

P275SL P295GH 17 Mn 4 14 21 02-xx P275NL2 EStE 285

P355GH 19 Mn 6 – P355N StE 355 14 21 06-xx

16Mo3 15 Mo 3 14 29 12 P355NH WStE 355 14 21 06-xx

P355NL1 TStE 355 14 21 07-xx

P355NL2 EStE 355

CODES IN DESIGNATIONS

P = steel for pressure purposesS = simple pressure vessel The Rp0,2 yield strength values at elevated tempera- tures are specified. Impact strength:

Longitudinally t °C KV J

-20 28

L = The Rp0,2 yield strength values at elevated tempera- tures are specified. Impact strength:

Longitudinally t °C KV J

-50 28

P = steel for pressure purposesG = non-alloy steelH = High operating temperature The Rp0,2 yield strength values at elevated temperatures are specified. Impact strength:

Steel grade Transversally t °C KV J

GH steels -20 27 16Mo3 +20 31

P = steel for pressure purposesN = Normalized or normalized rolledH = High operating temperature The Rp0,2 yield strength values at elevated temperatures are specified. L = Low operating temperature Impact strength:

Steel grade Transversally Longitudinally t °C KV J t °C KV J

P...N, P...NH -20 30 -20 45 P...NL1 -40 27 -50 30 P...NL2 -50 27 -50 42 Transversally test specimens are used unless otherwise agreed. The reference steels are respectively tested using longitudinal specimens.

For accurate comparison, the original standards and data sheets must be used.

This data sheet is accurate to the best of our knowledge and understanding. Although every effort has been made to ensure accuracy, the company cannot accept responsibility for any loss, damage or other consequence resulting from the use of this publication.

We reserve the right to make changes.

Copyright © 2010 Rautaruukki Corporation. All rights reserved. Ruukki, Rautaruukki,More With Metals and Ruukki’s product names are trademarks or registered trademarks of Rautaruukki Corporation.

• Our Customer Service is happy to give you further information

Sales, Technical Customer Support info.metals@ruukki.com

Rautaruukki Corporation, P.O. Box 138, FI-00811 Helsinki, Finland. tel. +358 20 5911 www.ruukki.com

66