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B.S. 331S40 Details

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331S40 Application:Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Category Type Grade Designations
Grades Stainless Steels 331S40 UK - B.S. , BS 970-4 - Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Chemical composition(wt.%) of 331S40 grade: BS 970-4

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.35 0.50
Si 1.00 2.00
Mn 0.50 1.00
P - 0.040
S - 0.030
Cr 12.00 15.00
Ni 12.00 15.00
Mo - -
W 2.00 3.00
Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Mechanical properties of grade 331S40 BS 970-4

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)
688 (≥) 335 (≥) 12 34 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical properties of grade 331S40 BS 970-4

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
818 (≥) 656 (≥) 34 11 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 131
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
527 987 577

331S40 - 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
331S40 B.S. UK
Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

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