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STS303 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS303

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KS STS303

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This page is mainly introduced the STS303 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STS303,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
KS standard austenite stainless steel bars(KS D3706-1992)

Steel Garde:STS303
Type:Special Alloy
Country:Korea
Standard:KS
Application:KS standard austenite stainless steel bars(KS D3706-1992)

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
STS303Se	KS	Korea

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	407～469	σb/MPa
Yield Strength	314	σ 0.2 ≥/MPa
Elongation	95	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	785～849	-
HRC	30	-

Physical Properties

Thermal expansion	26-90	e-6/K
Thermal conductivity	13-68	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	6477-8353	째C
Density	0173-7515	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)
STS303 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