Group

Subgroup

Structural and constructional steels

Material properties

Comment

Application

SEW 550 Steel for larger forged parts

Quality specifications

-

34 CrNiMo 6 (Germany / DIN)Material

MinDimension Max Approx

Yield Stress[MPa]

Forging; Quenched and tempered; <= 250 mm 590 - -

Forging; Quenched and tempered; <= 250 mm 590 - -

Forging; Quenched and tempered; > 250 <= 500 mm 540 - -

Forging; Quenched and tempered; > 250 <= 500 mm 540 - -

Forging; Quenched and tempered; > 500 <= 1000 mm 490 - -

Forging; Quenched and tempered; > 500 <= 1000 mm 490 - -

MinDimension Max Approx

Tensile Stress[MPa]

Forging; Quenched and tempered; <= 250 mm 780 930 -

Forging; Quenched and tempered; <= 250 mm 780 930 -

Forging; Quenched and tempered; > 250 <= 500 mm 740 890 -

Forging; Quenched and tempered; > 250 <= 500 mm 740 890 -

Forging; Quenched and tempered; > 500 <= 1000 mm 690 840 -

Forging; Quenched and tempered; > 500 <= 1000 mm 690 840 -

MinDimension Max Approx

Elongation A5 [%]

Forging; Quenched and tempered; <= 250 mm 13.0 - -

Lo = 5 x d; (long.)Note:

Forging; Quenched and tempered; <= 250 mm 11.0 - -

Lo = 5 x d; (tang.)Note:

Forging; Quenched and tempered; > 250 <= 500 mm 14.0 - -

Lo = 5 x d; (long.)Note:

Forging; Quenched and tempered; > 250 <= 500 mm 12.0 - -

Lo = 5 x d; (tang.)Note:

Forging; Quenched and tempered; > 500 <= 1000 mm 15.0 - -

Lo = 5 x d; (long.)Note:

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MinDimension Max Approx

Elongation A5 [%]

Forging; Quenched and tempered; > 500 <= 1000 mm 13.0 - -

Lo = 5 x d; (tang.)Note:

MinDimension Max Approx

Impact [J]

Forging; Quenched and tempered; <= 250 mm 41 - -

Charpy V Notch; (long.)Impact Test:

Forging; Quenched and tempered; <= 250 mm 31 - -

Charpy V Notch; (tang.)Impact Test:

Forging; Quenched and tempered; > 250 <= 500 mm 41 - -

Charpy V Notch; (long.)Impact Test:

Forging; Quenched and tempered; > 250 <= 500 mm 31 - -

Charpy V Notch; (tang.)Impact Test:

Forging; Quenched and tempered; > 500 <= 1000 mm 41 - -

Charpy V Notch; (long.)Impact Test:

Forging; Quenched and tempered; > 500 <= 1000 mm 31 - -

Charpy V Notch; (tang.)Impact Test:

Min Max

Chemical Composition [%]

Criterion Approx

C 0.3000 0.3800 -

Si - 0.4000 -

Mn 0.4000 0.7000 -

P - 0.0350 -

S - 0.0350 -

Cr 1.4000 1.7000 -

Mo 0.1500 0.3000 -

Ni 1.4000 1.7000 -

Cross Reference Table

Standard CountryMaterial

France34 CrNiMo 6 AFNOR NF

USA4337 AISI

USAA 519 4337 ASTM

United Kingdom34 CrNiMo 6 B.S.

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Cross Reference Table

Standard CountryMaterial

Czech Republic16343 CSN

GermanyGS-34 CrNiMo 6 DIN

European Union1.6582 EN

European Union34 CrNiMo 6 EN

European Union35 CrNiMo 6 KD EN

Russia38Ch2N2MA GOST

JapanSNCM 447 JIS

YugoslaviaC 5431 JUS

Belgium34 CrNiMo 6 NBN

Norway34 CrNiMo 6 NS

Poland34 HNM PN

USA4337 SAE

Sweden2541 SS

Romania34 MoCrNi 16 STAS

Romania34 MoCrNi 16 q STAS

Romania34 MoCrNi 15 STAS

Spain34 CrNiMo 6 UNE

Italy34 CrNiMo 6 UNI

Italy35 NiCrMo 6 KB UNI

USAG43370 UNS

Germany1.6582 WN

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