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England B.S. 331S40 Specification for wrought steels for mechanical and allied engineering purposes. Valve steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 331S40 / 331 S 40
Category Grade Standard Region/Area Standard Content
Metals 331 S 40 BS 970-4 England Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Chemical composition(mass fraction)(wt.%) of the 331 S 40

Element Min Max Similar
Cu - 0.5000 -
Ti - 0.1000 -
Nb - 0.2000 -
W 2.0000 3.0000 -
Si 1.0000 2.0000 -
S - 0.0300 -
P - 0.0400 -
Ni 12.0000 15.0000 -
Mo - 0.7000 -
Mn 0.5000 1.0000 -
Cr 12.0000 15.0000 -
C 0.3500 0.5000 -

Mechanical Properties of steel grade 331 S 40

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
298 (≥) 584 (≥) 11 41 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade 331 S 40

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
34 - -     0.23 -  
866 168 - 32.3 412   -  
149 - 31 33.2   412 344

Heat Treatment of steel grade 331 S 40

Heat treated : 1154°C - 1973°C

Technological Curves of steel grade 331 S 40

Cross Reference Table (Equivalent Grade) of 331 S 40

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