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331S40

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NA21 331S42
#331S40

Description

UK B.S. BS 970-4, 331S40 Specialsteel Specification for wrought steels for mechanical and allied engineering purposes. Valve steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 331S40
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 331S40 B.S. UK Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Chemical composition(mass fraction)(wt.%) of the 331S40

C Si Mn P S Cr Ni Mo W
0.35 -0.50 1.00 -2.00 0.50 -1.00 ≤0.040 ≤0.030 12.00 -15.00 12.00 -15.00 ≤ ≥ 2.00 -3.00

Mechanical Properties of steel grade 331S40

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)
146 (≥) 181 (≥) 11 12 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade 331S40

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 - -     0.21 -  
385 549 - 33.3 244   -  
193 - 33 22.2   333 322

Heat Treatment of steel grade 331S40

Heat treated : 1664°C - 1594°C

Technological Curves of steel grade 331S40

Relevant standard of 331S40

BS 970-4 Specification for wrought steels for mechanical and allied engineering purposes. Valve steels BS-970-4.pdf
NA21 331S42
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