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England B.S. S149 Specification for 1.75% nickel-chromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: S149 / S 149
Category Grade Standard Region/Area Standard Content
Metals S 149 BS 2S 149 England Specification for 1.75% nickel-chromium-molybdenum steel bars for the manufacture of forged bolts and forged nuts

Chemical composition(mass fraction)(wt.%) of the S 149

Element Min Max Similar

Mechanical Properties of steel grade S 149

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)
663 (≥) 465 (≥) 44 34 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade S 149

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
14 - -     0.11 -  
372 595 - 14.3 111   -  
848 - 21 21.2   433 231

Heat Treatment of steel grade S 149

Heat treated : 1954°C - 1342°C

Technological Curves of steel grade S 149

Cross Reference Table (Equivalent Grade) of S 149

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