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SA-268 29-4-2

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SA-240 Type 29-4-2 SA-731 29-4-2
#29-4-2

Description

USA AMS SA-268/SA-268M, SA-268 29-4-2 Specialsteel Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: SA-268 29-4-2
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel SA-268 29-4-2 Precipitation-Hardening AMS USA Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service

Chemical composition(mass fraction)(wt.%) of the SA-268 29-4-2

C Si Mn P S Ni Cr Al Cu Ti Fe N Mo
≤0.01 ≤0.20 ≤0.30 ≤ ≥ ≤ ≥ 2.00 -2.50 28.00 -30.00 ≤ ≥ ≤0.15 ≤ ≥ ≤ ≥ ≤0.02 3.50 -4.20

Mechanical Properties of steel grade SA-268 29-4-2

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)
878 (≥) 572 (≥) 13 43 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade SA-268 29-4-2

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
42 - -     0.34 -  
417 114 - 34.3 311   -  
211 - 34 33.2   334 323

Heat Treatment of steel grade SA-268 29-4-2

Heat treated : 1691°C - 1658°C

Technological Curves of steel grade SA-268 29-4-2

Cross Reference Table (Equivalent Grade) of SA-268 29-4-2

Grade Standard Country Application
29-4-2
29-4-2
29-4-2
29-4-2
29-4-2(S44800)

Relevant standard of SA-268 29-4-2

SA-268/SA-268M Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service SA-268-SA-268M.pdf
SA-240 Type 29-4-2 SA-731 29-4-2
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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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