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Global 企业标准 J122 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: J122 / J 122
Category Grade Standard Region/Area Standard Content
Metals J 122 -- Global

Chemical composition(mass fraction)(wt.%) of the J 122

Element Min Max Similar
Si 1.5000 2.5000 -
Mo 4.0000 5.0000 -
Mn 0.5000 0.8000 -
Cr 2.7500 3.2500 -
C 2.5000 3.0000 -

Mechanical Properties of steel grade J 122

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)
574 (≥) 415 (≥) 21 34 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade J 122

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 - -     0.21 -  
155 178 - 23.3 232   -  
656 - 34 33.2   434 211

Heat Treatment of steel grade J 122

Heat treated : 1438°C - 1491°C

Technological Curves of steel grade J 122

Cross Reference Table (Equivalent Grade) of J 122

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