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B.S. LW304 S31 Details

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LW304 S31 Application:Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

Category Type Grade Designations
Grades Stainless Steels LW304 S31 UK - B.S. , BS 3605-2 - Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

Chemical composition(wt.%) of LW304 S31 grade: BS 3605-2

Elements Min.(≥) Max.(≤) Similar Remarks
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
Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

Mechanical properties of grade LW304 S31 BS 3605-2

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
567 (≥) 122 (≥) 31 13 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical properties of grade LW304 S31 BS 3605-2

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
455 (≥) 223 (≥) 41 22 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 422
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
429 444 825

LW304 S31 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
304S31 B.S. UK
Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes
HFS 304S31 B.S. UK
Austenitic stainless steel pipes and tubes for pressure purposes. Specification for seamless tubes
LW 304S31 B.S. UK
Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes
304 S31 B.S. UK
Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes
HFS304 S31 B.S. UK
Austenitic stainless steel pipes and tubes for pressure purposes. Specification for seamless tubes
LW304 S31 B.S. UK
Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes

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