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England B.S. B12 Materials for resistance welding electrodes and ancillary equipment and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: B12 / B12
Category Grade Standard Region/Area Standard Content
Metals B12 BS 4577 England Materials for resistance welding electrodes and ancillary equipment

Chemical composition(mass fraction)(wt.%) of the B12

Element Min Max Similar

Mechanical Properties of steel grade B12

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)
262 (≥) 363 (≥) 32 11 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade B12

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
13 - -     0.32 -  
274 441 - 12.3 421   -  
838 - 21 14.2   213 113

Heat Treatment of steel grade B12

Heat treated : 1197°C - 1821°C

Technological Curves of steel grade B12

Cross Reference Table (Equivalent Grade) of B12

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