Group

Subgroup

Structural and constructional steels

Material properties

Comment

Application

GB/T 3077 (1988) CrMo alloy structural steels

20CrMo (China / GB)Material

MinDimension Max Approx

Yield Stress[MPa]

Semi finished products; Quenched and tempered:

dim. <= 15 mm

685 - -

MinDimension Max Approx

Tensile Stress[MPa]

Semi finished products; Quenched and tempered:

dim. <= 15 mm

885 - -

MinDimension Max Approx

Elongation A5 [%]

Semi finished products; Quenched and tempered:

dim. <= 15 mm

12.0 - -

MinDimension Max Approx

Impact [J]

Semi finished products; Quenched and tempered:

dim. <= 15 mm

78 - -

HardnessDimension

Hardness

Semi finished products; Quenched and tempered:

dim. <= 15 mm

< 197 HB

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Min Max

Chemical Composition [%]

Criterion Approx

C 0.1700 0.2400 -

Si 0.1700 0.3700 -

Mn 0.4000 0.7000 -

P - 0.0350 -

S - 0.0350 -

Cr 0.8000 1.1000 -

Mo 0.1500 0.2500 -

Ni - 0.3000 -

Cu - 0.3000 -

Cross Reference Table

Standard CountryMaterial

France15 CD 3.5 AFNOR NF

United Kingdom18CrMo4 B.S.

Germany18CrMo4 DIN

Germany16 CrMo 4 DIN

European Union1.7243 EN

European Union18 CrMo 4 EN

International18 CrMo 4 ISO

JapanSCM 418 H JIS

JapanSCM 418 JIS

Belgium18 CrMo 4 NBN

SpainF.1550 (18 CrMo 4) UNE

Italy18 CrMo 4 UNI

Germany1.7243 WN

Germany1.7242 WN

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