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China GB 4J38 精密合金牌号 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4J38 / 4J38
Category Grade Standard Region/Area Standard Content
Metals 4J38 GB/T 15018 China 精密合金牌号

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

Element Min Max Similar
Fe - - -
Se 0.1000 0.2500 -
Ni 35.0000 37.0000 -
Si - 0.2000 -
Mn - 0.8000 -
P - 0.0200 -
S - 0.0200 -
C - 0.0500 -

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)
743 (≥) 716 (≥) 33 41 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

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
12 - -     0.13 -  
872 839 - 32.3 123   -  
685 - 21 34.2   324 444

Heat Treatment of steel grade 4J38

Heat treated : 1687°C - 1423°C

Technological Curves of steel grade 4J38

Cross Reference Table (Equivalent Grade) of 4J38

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