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China HB 4J42 膨胀合金热处理工艺说明书 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4J42 / 4J42
Category Grade Standard Region/Area Standard Content
Metals 4J42 HB/Z 239 China 膨胀合金热处理工艺说明书

Chemical composition(mass fraction)(wt.%) of the 4J42

Element Min Max Similar

Mechanical Properties of steel grade 4J42

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)
643 (≥) 318 (≥) 13 22 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade 4J42

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
41 - -     0.12 -  
172 549 - 43.3 444   -  
656 - 22 42.2   244 441

Heat Treatment of steel grade 4J42

Heat treated : 1468°C - 1543°C

Technological Curves of steel grade 4J42

Cross Reference Table (Equivalent Grade) of 4J42

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