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China GB GCr4 高碳铬轴承钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GCr4 / GCr4
Category Grade Standard Region/Area Standard Content
Metals GCr4 GB/T 18254 China 高碳铬轴承钢

Chemical composition(mass fraction)(wt.%) of the GCr4

Element Min Max Similar
Si 0.1500 0.3000 -
S - 0.0200 -
P - 0.0250 -
Ni - 0.2500 -
Mo - 0.0800 -
Mn 0.1500 0.3000 -
Cu - 0.2000 -
Cr 0.3500 0.5000 -
C 0.9500 1.0500 -

Mechanical Properties of steel grade GCr4

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)
154 (≥) 749 (≥) 31 13 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade GCr4

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
31 - -     0.33 -  
532 595 - 42.3 343   -  
167 - 44 44.2   114 422

Heat Treatment of steel grade GCr4

Heat treated : 1166°C - 1586°C

Technological Curves of steel grade GCr4

Cross Reference Table (Equivalent Grade) of GCr4

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