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China HB GH4220 航空用高温合金热处理工艺 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GH4220 / GH4220
Category Grade Standard Region/Area Standard Content
Metals GH4220 HB/Z 140 China 航空用高温合金热处理工艺

Chemical composition(mass fraction)(wt.%) of the GH4220

Element Min Max Similar

Mechanical Properties of steel grade GH4220

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)
484 (≥) 863 (≥) 22 22 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade GH4220

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
33 - -     0.33 -  
257 644 - 31.3 233   -  
128 - 23 22.2   431 413

Heat Treatment of steel grade GH4220

Heat treated : 1878°C - 1922°C

Technological Curves of steel grade GH4220

Cross Reference Table (Equivalent Grade) of GH4220

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