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China GB 4J34 精密合金牌号 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4J34 / 4J34
Category Grade Standard Region/Area Standard Content
Metals 4J34 GB/T 15018 China 精密合金牌号

Chemical composition(mass fraction)(wt.%) of the 4J34

Element Min Max Similar

Mechanical Properties of steel grade 4J34

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)
697 (≥) 771 (≥) 24 34 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical Properties of steel grade 4J34

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 - -     0.34 -  
436 733 - 14.3 142   -  
491 - 43 12.2   331 233

Heat Treatment of steel grade 4J34

Heat treated : 1726°C - 1359°C

Technological Curves of steel grade 4J34

Cross Reference Table (Equivalent Grade) of 4J34

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