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SA-29 Grade 4140

Description

USA AMS SA-29/SA-29M, SA-29 Grade 4140 Specialsteel Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: SA-29 Grade 4140
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel SA-29 Grade 4140 Precipitation-Hardening AMS USA Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for

Chemical composition(mass fraction)(wt.%) of the SA-29 Grade 4140

C Si Mn P S Ni Cr Al Cu Ti Fe N Mo
≤0.01 ≤0.20 ≤0.30 ≤ ≥ ≤ ≥ ≤0.15 28.00 -30.00 ≤ ≥ ≤0.15 ≤ ≥ ≤ ≥ ≤0.02 3.50 -4.20

Mechanical Properties of steel grade SA-29 Grade 4140

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)
356 (≥) 277 (≥) 24 43 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical Properties of steel grade SA-29 Grade 4140

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 - -     0.33 -  
784 291 - 33.3 124   -  
329 - 31 34.2   132 331

Heat Treatment of steel grade SA-29 Grade 4140

Heat treated : 1285°C - 1867°C

Technological Curves of steel grade SA-29 Grade 4140

Cross Reference Table (Equivalent Grade) of SA-29 Grade 4140

Relevant standard of SA-29 Grade 4140

SA-29/SA-29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for SA-29-SA-29M.pdf

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