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China GB 4J80 精密合金牌号 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4J80 / 4J80
Category Grade Standard Region/Area Standard Content
Metals 4J80 GB/T 15018 China 精密合金牌号

Chemical composition(mass fraction)(wt.%) of the 4J80

Element Min Max Similar
W 9.5000 11.5000 -
Mo 9.5000 11.0000 -
Cu 1.5000 2.5000 -
Ni - - -
Si - 0.3000 -
Mn - 0.4000 -
P - 0.0200 -
S - 0.0200 -
C - 0.0500 -

Mechanical Properties of steel grade 4J80

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)
613 (≥) 918 (≥) 34 42 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade 4J80

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
34 - -     0.34 -  
234 743 - 22.3 113   -  
525 - 24 32.2   433 222

Heat Treatment of steel grade 4J80

Heat treated : 1451°C - 1112°C

Technological Curves of steel grade 4J80

Cross Reference Table (Equivalent Grade) of 4J80

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