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303S31 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 303S31

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B.S. 303S31

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This page is mainly introduced the 303S31 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 303S31,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Steel Garde:303S31
Type:Stainless Steels
Country:UK
Standard:B.S.

Standard Number:

ITEM	Standard Number	Descriptions
1	BS 1554	Specification for stainless and heat-resisting steel round wire
2	BS 6258	Specification for hollow steel bars for machining
3	BS 970-1	Specification for wrought steels for mechanical and allied engineering purposes. General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels
4	BS 970-3	Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Application:Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.12
Si		1.00
Mn		2.00
P		0.06
S	0.15	0.35
Cr	17.00	19.00
Mo		1.00
Ni	8.00	10.00

Mechanical Properties

Tensile strength	121～146	σb/MPa
Yield Strength	531	σ 0.2 ≥/MPa
Elongation	68	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	127～498	-
HRC	30	-

Physical Properties

Thermal expansion	21-35	e-6/K
Thermal conductivity	68-79	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	9017-8465	째C
Density	5370-5848	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)
303S31 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