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B.S. 304S31 Details

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304S31 Application:Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Category Type Grade Designations
Grades Stainless Steels 304S31 UK - B.S. , BS 1449-2 - Steel plate, sheet and strip. Specification for stainless and heat-resisting steel plate, sheet and strip
BS 1501-3 - Steels for pressure purposes. Specification for corrosion- and heat-resisting steels: plates, sheet and strip
BS 1502 - Specification for steels for fired and unfired pressure vessels: sections and bars
BS 1503 - Specification for steel forgings for pressure purposes
BS 1506 - Specification for carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications
BS 1554 - Specification for stainless and heat-resisting steel round wire
BS 3605-1 - Austenitic stainless steel pipes and tubes for pressure purposes. Specification for seamless tubes
BS 3605-2 - Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes
BS 3606 - Specification for steel tubes for heat exchangers
BS 6258 - Specification for hollow steel bars for machining
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
BS 970-3 - Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Chemical composition(wt.%) of 304S31 grade: BS 1449-2

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.07
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 17.00 19.00
Mo - -
Ni 8.00 11.00
Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Mechanical properties of grade 304S31 BS 1449-2

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)
869 (≥) 957 (≥) 24 11 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical properties of grade 304S31 BS 1449-2

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
837 (≥) 444 (≥) 32 21 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 213
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
914 854 541

304S31 - 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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