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A 29 4140

Favorite Datasheet
A 29 4137 A 29 4142
#29-4

Description

USA SAE A 29/A 29M (2012), A 29 4140 Specialsteel Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

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

Chemical composition(mass fraction)(wt.%) of the A 29 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 A 29 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)
343 (≥) 171 (≥) 12 31 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade A 29 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
33 - -     0.33 -  
534 543 - 31.3 112   -  
314 - 32 22.2   334 431

Heat Treatment of steel grade A 29 4140

Heat treated : 1116°C - 1362°C

Technological Curves of steel grade A 29 4140

Cross Reference Table (Equivalent Grade) of A 29 4140

Grade Standard Country Application
29-4
29-4C
29-4-2
29-4
29-4-2
29-4C
29-4
29-4-2
29-4
29-4-2
29-4C(S44735)
29-4-2(S44800)
X2CrMoTi29-4
X2CrMoTi29-4

Relevant standard of A 29 4140

A 29/A 29M (2012) Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for A-29-A-29M-(2012).pdf
A 29 4137 A 29 4142
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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