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China GB GCr9 高碳铬轴承钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GCr9 / GCr9
Category Grade Standard Region/Area Standard Content
Metals GCr9 GB/T 18254 China 高碳铬轴承钢

Chemical composition(mass fraction)(wt.%) of the GCr9

Element Min Max Similar
C 1.0000 1.1000 -
Mn 0.2500 0.4500 -
P - 0.0250 -
S - 0.0250 -
Si 0.1500 0.3500 -
Ni - 0.3000 -
Cr 0.9000 1.2000 -
Mo - 0.0800 -
Cu - 0.2500 -
Ni+Cu - 0.5000 -

Mechanical Properties of steel grade GCr9

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)
929 (≥) 171 (≥) 43 14 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade GCr9

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
12 - -     0.41 -  
684 196 - 11.3 242   -  
357 - 22 41.2   321 444

Heat Treatment of steel grade GCr9

Heat treated : 1846°C - 1533°C

Technological Curves of steel grade GCr9

Cross Reference Table (Equivalent Grade) of GCr9

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