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America SAE 3120 Former SAE Standard and Former SAE Ex-Steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 3120 / 3120
Category Grade Standard Region/Area Standard Content
Metals 3120 SAE J 1249 America Former SAE Standard and Former SAE Ex-Steels

Chemical composition(mass fraction)(wt.%) of the 3120

Element Min Max Similar
Si 0.2000 0.3500 -
S - 0.0400 -
P - 0.0400 -
Ni 1.1000 1.4000 -
Mn 0.6000 0.8000 -
Cr 0.5500 0.7500 -
C 0.1700 0.2200 -

Mechanical Properties of steel grade 3120

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)
369 (≥) 571 (≥) 24 32 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade 3120

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
21 - -     0.24 -  
411 674 - 12.3 421   -  
849 - 44 34.2   424 114

Heat Treatment of steel grade 3120

Heat treated : 1114°C - 1531°C

Technological Curves of steel grade 3120

Cross Reference Table (Equivalent Grade) of 3120

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