Cr42mo4 Steel

cr42mo4 steel

42CrMo4 standard control:

China GB 42CrMo, Russia OCT 38XM, USA AISI 4140/4142, UK BS 708M40/708A42/709M40, France NF 40CD4/42CD4, Germany DIN 41CrMo4/42CrMo4, Japan JIS SCM4, international ISO 683/13

Mechanical property

Tensile strength σb (MPa) : ≥1080(110)

Yield strength σs (MPa) : ≥930(95)

Elongation δ5 (%) : ≥12

Section shrinkage (%) : ≥45

Impact power Akv (J) : ≥63

Impact toughness value αkv (J/cm²) : ≥78(8)

Hardness: ≤217HB

Specimen size: specimen blank size is 25mm

Heat treatment specification and metallographic structure

Heat treatment specification: quench 850℃, oil cold; Tempering 560℃, water cooling, oil cooling.

Metallographic structure: tempered sorbite.

Differences between 42crmo4 and 42crmo

Material: 42 CrMo 4

Numerical: 1.7225

Standard: EN

Countries and Territories: European Union

Chemical composition (%)

Element min-max approximate

C 0.3800 0.4500

Si 0.4000

Mn 0.6000 0.9000

P 0.0250

S 0.0350

Cr 0.9000 1.2000

Mo 0.1500 0.3000

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