42crmo4 Steel Number

42crmo4 steel number

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.

Steel adjustment formula

Sheet weight = Length × width × thickness ×0.00000785KG (unit mm)

Bar weight =3.14X length × radius ^2×0.00000785KG (unit mm)

Pipe weight =3.14X length × (outer diameter ^2- inner diameter ^2)×0.00000785KG (unit mm)

Typical application examples

1) Suitable for integrated forming electrical and electronic molds.

2) Suitable for plastic mold, mold base.

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