STS631

This page provides STS631 datasheet, STS631 mechanical properties, chemical element STS631, technical specifications of STS631 steel material properties. STS631 performance specifications.

KS STS631
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy STS631 KS Korea martensitic steel
STS420J1
STS420J2
STS420F
STS420F2
STS431
STS440A
STS440B
STS440C
STS440F
STS630
Datasheet for:Steel Grades:Special Alloy:STS631

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

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Al(%)
Max 0.09 Max 1.00 Max 1.00 Max 0.04 Max 0.03 16.0-18.0 6.50-7.75 0.75-1.50

Mechanical properties / Mechanische Eigenschaften / Caracteristiques mecaniques of 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)
431 (≥) 984 (≥) 22 12 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 133
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
44 - -     0.41 -  
648 298 - 31.3 133   -  
212 - 31 23.2   212 413
Heat treated : 1975°C - 1883°C
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
STS631 KS Korea
martensitic steel
STS631 KS Korea
martensitic steel
STS631

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STS631 can be supplied as steel plate/ sheet, round steel bar, steel tube/pipe, steel stripe, steel billet, steel ingot, steel wire rods. electroslag, forged ring/ block,etc.
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