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China CGMA 18CrMnBH 车辆齿轮用钢 技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18CrMnBH / 18CrMnBH
Category Grade Standard Region/Area Standard Content
Metals 18CrMnBH CGMA001-1 China 车辆齿轮用钢 技术条件

Chemical composition(mass fraction)(wt.%) of the 18CrMnBH

Element Min Max Similar
B 0.0010 0.0030 -
Cu - 0.2000 -
Cr 1.0000 1.3000 -
S 0.0150 0.0350 -
P - 0.0300 -
Mn 1.0000 1.3000 -
Si 0.1500 0.4000 -
C 0.1500 0.2000 -

Mechanical Properties of steel grade 18CrMnBH

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)
267 (≥) 258 (≥) 23 33 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade 18CrMnBH

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 - -     0.43 -  
815 754 - 32.3 132   -  
488 - 14 43.2   244 333

Heat Treatment of steel grade 18CrMnBH

Heat treated : 1959°C - 1659°C

Technological Curves of steel grade 18CrMnBH

Cross Reference Table (Equivalent Grade) of 18CrMnBH

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