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America SAE 4125 Former SAE Standard and Former SAE Ex-Steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4125 / 4125
Category Grade Standard Region/Area Standard Content
Metals 4125 SAE J 1249 America Former SAE Standard and Former SAE Ex-Steels

Chemical composition(mass fraction)(wt.%) of the 4125

Element Min Max Similar

Mechanical Properties of steel grade 4125

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)
475 (≥) 415 (≥) 23 44 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical Properties of steel grade 4125

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
44 - -     0.22 -  
986 578 - 14.3 442   -  
213 - 31 33.2   232 433

Heat Treatment of steel grade 4125

Heat treated : 1776°C - 1458°C

Technological Curves of steel grade 4125

Cross Reference Table (Equivalent Grade) of 4125

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