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SA-688 S31254

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SA-479 S31254 SA-813 S31254
#254SMO #S31254

Description

USA AMS SA-688/SA-688M, SA-688 S31254 Specialsteel Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: SA-688 S31254
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel SA-688 S31254 Austenite AMS USA Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes

Chemical composition(mass fraction)(wt.%) of the SA-688 S31254

C Mn Si P S Cr Ni Mo Cu N
≤0.02 ≤1.00 ≤0.80 ≤0.03 ≤0.01 19.50 -20.50 17.50 -18.50 6.00 -6.50 0.50 -1.00 0.18 -0.22

Mechanical Properties of steel grade SA-688 S31254

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)
545 (≥) 393 (≥) 24 13 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade SA-688 S31254

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 - -     0.21 -  
879 367 - 14.3 232   -  
814 - 23 41.2   333 243

Heat Treatment of steel grade SA-688 S31254

Heat treated : 1982°C - 1518°C

Technological Curves of steel grade SA-688 S31254

Cross Reference Table (Equivalent Grade) of SA-688 S31254

Grade Standard Country Application
254SMO
254SMO(S31254)
S31254
S31254
S31254
S31254
S31254
S31254
S31254
S31254

Relevant standard of SA-688 S31254

SA-688/SA-688M Specification for Welded Austenitic Stainless Steel Feedwater Heater Tubes SA-688-SA-688M.pdf
SA-479 S31254 SA-813 S31254
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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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