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America SAE 4131 Chemical compositions of SAE alloy steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4131 / 4131
Category Grade Standard Region/Area Standard Content
Metals 4131 SAE J 404 America Chemical compositions of SAE alloy steels

Chemical composition(mass fraction)(wt.%) of the 4131

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0350 -
Mo 0.1500 0.2500 -
Mn 0.5000 0.7000 -
Cr 0.9000 1.2000 -
C 0.2800 0.3300 -
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0350 -
Ni - 0.2500 -
Mo 0.1500 0.2500 -
Mn 0.5000 0.7000 -
Cu - 0.3500 -
Cr 0.9000 1.2000 -
C 0.2800 0.3300 -

Mechanical Properties of steel grade 4131

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)
392 (≥) 866 (≥) 22 43 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade 4131

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
41 - -     0.11 -  
849 397 - 14.3 431   -  
152 - 13 21.2   312 414

Heat Treatment of steel grade 4131

Heat treated : 1679°C - 1269°C

Technological Curves of steel grade 4131

Cross Reference Table (Equivalent Grade) of 4131

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