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China GB G70Mn 碳素轴承钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: G70Mn / G70Mn
Category Grade Standard Region/Area Standard Content
Metals G70Mn GB/T 28417 China 碳素轴承钢

Chemical composition(mass fraction)(wt.%) of the G70Mn

Element Min Max Similar
Si - 0.3500 -
S - 0.0350 -
P - 0.0300 -
Ni - 0.4500 -
Mo - 0.1500 -
Mn 0.5000 1.4000 -
Cu - 0.6000 -
Cr - 0.3500 -
CEV - 0.2600 -
C - 0.2000 -

Mechanical Properties of steel grade G70Mn

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)
888 (≥) 741 (≥) 31 33 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade G70Mn

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 - -     0.41 -  
488 185 - 43.3 241   -  
766 - 43 34.2   421 231

Heat Treatment of steel grade G70Mn

Heat treated : 1116°C - 1651°C

Technological Curves of steel grade G70Mn

Cross Reference Table (Equivalent Grade) of G70Mn

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