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China CGMA 28MnCrH 车辆齿轮用钢 技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 28MnCrH / 28MnCrH
Category Grade Standard Region/Area Standard Content
Metals 28MnCrH CGMA001-1 China 车辆齿轮用钢 技术条件

Chemical composition(mass fraction)(wt.%) of the 28MnCrH

Element Min Max Similar
Cu - 0.2000 -
Al 0.0200 0.0550 -
Mo - 0.1000 -
Cr 0.8000 1.1000 -
Ni - 0.1500 -
S 0.0200 0.0350 -
P - 0.0300 -
Mn 0.6000 0.8000 -
Si - 0.1200 -
C 0.2500 0.3000 -

Mechanical Properties of steel grade 28MnCrH

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)
243 (≥) 582 (≥) 42 14 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical Properties of steel grade 28MnCrH

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
21 - -     0.13 -  
733 136 - 24.3 243   -  
933 - 32 32.2   313 243

Heat Treatment of steel grade 28MnCrH

Heat treated : 1325°C - 1435°C

Technological Curves of steel grade 28MnCrH

Cross Reference Table (Equivalent Grade) of 28MnCrH

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