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LW304 S31 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of LW304 S31

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B.S. LW304 S31

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This page is mainly introduced the LW304 S31 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of LW304 S31,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

Steel Garde:LW304 S31
Type:Stainless Steels
Country:UK
Standard:B.S.

Standard Number:

ITEM	Standard Number	Descriptions
1	BS 3605-2	Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

Application:Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
304S31	B.S.	UK
HFS 304S31	B.S.	UK
LW 304S31	B.S.	UK
304 S31	B.S.	UK
HFS304 S31	B.S.	UK

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C		0.07
Si		1.00
Mn		2.00
P		0.045
S		0.025
Cr	17.00	19.00
Mo
Ni	8.00	11.00

Mechanical Properties

Tensile strength	691～897	σb/MPa
Yield Strength	176	σ 0.2 ≥/MPa
Elongation	51	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	489～686	-
HRC	30	-

Physical Properties

Thermal expansion	77-17	e-6/K
Thermal conductivity	85-11	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3886-1922	째C
Density	4044-7799	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)
LW304 S31 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