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Global 企业标准 4140H and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4140H / 4140H
Category Grade Standard Region/Area Standard Content
Metals 4140H -- Global

Chemical composition(mass fraction)(wt.%) of the 4140H

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0350 -
Mo 0.1500 0.2500 -
Mn 0.6500 1.1000 -
Cr 0.7500 1.2000 -
C 0.3700 0.4400 -

Mechanical Properties of steel grade 4140H

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)
972 (≥) 471 (≥) 34 44 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 314

Physical Properties of steel grade 4140H

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
31 - -     0.31 -  
642 316 - 34.3 143   -  
991 - 41 22.2   311 111

Heat Treatment of steel grade 4140H

Heat treated : 1617°C - 1676°C

Technological Curves of steel grade 4140H

Cross Reference Table (Equivalent Grade) of 4140H

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