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UK B.S. BS 970-4, 349S54 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: 349S54
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 349S54 B.S. UK Specification for wrought steels for mechanical and allied engineering purposes. Valve steels

Chemical composition(mass fraction)(wt.%) of the 349S54

C Si Mn P S Cr Ni Mo N C+N
0.48 -0.58 ≤0.25 8.00 -10.00 ≤0.040 0.035 -0.080 20.00 -22.00 3.25 -4.50 ≤ ≥ 0.38 -0.50 0.90 - ≥

Mechanical Properties of steel grade 349S54

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)
683 (≥) 511 (≥) 24 22 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical Properties of steel grade 349S54

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
11 - -     0.14 -  
567 829 - 33.3 314   -  
573 - 21 41.2   334 233

Heat Treatment of steel grade 349S54

Heat treated : 1953°C - 1133°C

Technological Curves of steel grade 349S54

Relevant standard of 349S54

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

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