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China HB 4J38 膨胀合金热处理工艺说明书 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4J38 / 4J38
Category Grade Standard Region/Area Standard Content
Metals 4J38 HB/Z 239 China 膨胀合金热处理工艺说明书

Chemical composition(mass fraction)(wt.%) of the 4J38

Element Min Max Similar

Mechanical Properties of steel grade 4J38

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)
234 (≥) 966 (≥) 13 11 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical Properties of steel grade 4J38

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
22 - -     0.23 -  
628 987 - 23.3 233   -  
738 - 12 12.2   444 234

Heat Treatment of steel grade 4J38

Heat treated : 1256°C - 1745°C

Technological Curves of steel grade 4J38

Cross Reference Table (Equivalent Grade) of 4J38

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