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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)
588 (≥) 566 (≥) 14 13 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

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
43 - -     0.12 -  
418 938 - 23.3 123   -  
476 - 11 23.2   442 123

Heat Treatment of steel grade GCr4

Heat treated : 1839°C - 1892°C

Technological Curves of steel grade GCr4

Cross Reference Table (Equivalent Grade) of GCr4

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