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Description

Korea KS D 3534 (2002), D 3698 (2008), D 3705 (2008), D 3706 (2008), STS631 Specialsteel Stainless steel bars and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: STS631
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel STS631 Precipitation-Hardening KS Korea Stainless steel bars

Chemical composition(mass fraction)(wt.%) of the STS631

C Si Mn P S Cr Ni Mo N Al
≤0.09 ≤1.00 ≤1.00 ≤0.040 ≤0.030 16.00 -18.00 6.50 -7.75 ≤ ≥ ≤ ≥ 0.75 -1.50

Mechanical Properties of steel grade STS631

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)
498 (≥) 495 (≥) 32 11 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade STS631

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 - -     0.34 -  
148 124 - 14.3 432   -  
659 - 12 24.2   342 412

Heat Treatment of steel grade STS631

Heat treated : 1328°C - 1478°C

Technological Curves of steel grade STS631

Cross Reference Table (Equivalent Grade) of STS631

Grade Standard Country Application
STS631
STS631

Relevant standard of STS631

D 3534 (2002) Cold rolled stainless steel strip for springs D-3534-(2002).pdf
D 3698 (2008) Cold rolled stainless steel plates, sheets and strip D-3698-(2008).pdf
D 3705 (2008) Hot rolled stainless steel plates, sheets and strip D-3705-(2008).pdf
D 3706 (2008) Stainless steel bars D-3706-(2008).pdf

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