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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.
STS631

Steel Garde:STS631
Type:Special Alloy
Country:Korea
Standard:KS
Application:martensitic steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STS631	KS	Korea

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	765～679	σb/MPa
Yield Strength	551	σ 0.2 ≥/MPa
Elongation	06	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	392～003	-
HRC	30	-

Physical Properties

Thermal expansion	40-17	e-6/K
Thermal conductivity	17-96	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5531-1198	째C
Density	2581-2653	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 Special Alloy	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