STS631 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS631

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KS STS631

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This page is mainly introduced the STS631 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS631,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Stainless steel bars

Cross Reference Table(Equivalent Materials):

Material Standard Country
STS631CSP KS Korea
STS631J1 KS Korea

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C   0.09
Si   1.00
Mn   1.00
P   0.040
S   0.030
Cr 16.00  18.00
Ni 6.50  7.75
Mo  
N  
Al 0.75  1.50

Mechanical Properties

Tensile strength 975~156 σb/MPa
Yield Strength 945 σ 0.2 ≥/MPa
Elongation 60 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 751~902 -
HRC 30 -

Physical Properties

Thermal expansion 86-81 e-6/K
Thermal conductivity 96-26 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 8602-4503 째C
Density 9767-1005 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
STS631 Stainless Steels Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download