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Description

UK B.S. BS 970-4, 401S45 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: 401S45
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 401S45 B.S. UK Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Chemical composition(mass fraction)(wt.%) of the 401S45

C Si Mn P S Cr Ni Mo
0.40 -0.50 3.00 -3.75 0.30 -0.75 ≤0.040 ≤0.030 7.50 -9.50 ≤0.50 ≤ ≥

Mechanical Properties of steel grade 401S45

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)
919 (≥) 527 (≥) 21 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade 401S45

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
32 - -     0.23 -  
547 884 - 32.3 311   -  
361 - 12 12.2   223 414

Heat Treatment of steel grade 401S45

Heat treated : 1529°C - 1911°C

Technological Curves of steel grade 401S45

Relevant standard of 401S45

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

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