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China CGMA 25MnCrH 车辆齿轮用钢 技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25MnCrH / 25MnCrH
Category Grade Standard Region/Area Standard Content
Metals 25MnCrH CGMA001-1 China 车辆齿轮用钢 技术条件

Chemical composition(mass fraction)(wt.%) of the 25MnCrH

Element Min Max Similar
Cu - 0.2000 -
Al 0.0200 0.0550 -
Cr 0.8000 1.1000 -
S 0.0200 0.0350 -
P - 0.0300 -
Mn 0.6000 0.8000 -
Si - 0.1200 -
C 0.2300 0.2800 -

Mechanical Properties of steel grade 25MnCrH

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)
278 (≥) 915 (≥) 42 32 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade 25MnCrH

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 - -     0.31 -  
148 566 - 12.3 211   -  
547 - 42 43.2   343 213

Heat Treatment of steel grade 25MnCrH

Heat treated : 1751°C - 1891°C

Technological Curves of steel grade 25MnCrH

Cross Reference Table (Equivalent Grade) of 25MnCrH

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