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Description

UK B.S. BS S 155, 2S.155 Specialsteel Specification for nickel-silicon-chromium-molybdenum-vanadium steel (vacuum arc remelted) billets, bars, forgings and parts (1900-2100 MPa: limiting ruling section 75 mm) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 2S.155
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 2S.155 B.S. UK Specification for nickel-silicon-chromium-molybdenum-vanadium steel (vacuum arc remelted) billets, bars, forgings and parts (1900-2100 MPa: limiting ruling section 75 mm)

Chemical composition(mass fraction)(wt.%) of the 2S.155

C Si Mn P S Cr Ni Mo Nb Cu
≤0.07 ≤0.60 ≤1.00 ≤0.035 ≤0.025 13.20 -14.70 5.00 -5.80 1.20 -2.00 0.10 -0.40 1.20 -2.00

Mechanical Properties of steel grade 2S.155

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)
766 (≥) 562 (≥) 13 24 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

Physical Properties of steel grade 2S.155

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
43 - -     0.33 -  
658 111 - 21.3 233   -  
294 - 21 32.2   211 423

Heat Treatment of steel grade 2S.155

Heat treated : 1839°C - 1963°C

Technological Curves of steel grade 2S.155

Relevant standard of 2S.155

BS S 155 Specification for nickel-silicon-chromium-molybdenum-vanadium steel (vacuum arc remelted) billets, bars, forgings and parts (1900-2100 MPa: limiting ruling section 75 mm) BS-S-155.pdf

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