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Japan JIS 70Mn4 高碳鉻軸承鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 70Mn4 / 70Mn4
Category Grade Standard Region/Area Standard Content
Metals 70Mn4 JIS G4805 Japan 高碳鉻軸承鋼鋼料

Chemical composition(mass fraction)(wt.%) of the 70Mn4

Element Min Max Similar

Mechanical Properties of steel grade 70Mn4

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
483 (≥) 355 (≥) 41 24 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 112

Physical Properties of steel grade 70Mn4

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
32 - -     0.44 -  
114 336 - 34.3 324   -  
344 - 13 32.2   313 224

Heat Treatment of steel grade 70Mn4

Heat treated : 1898°C - 1136°C

Technological Curves of steel grade 70Mn4

Cross Reference Table (Equivalent Grade) of 70Mn4

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