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England B.S. A4/3 Materials for resistance welding electrodes and ancillary equipment and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A4/3 / A 4/3
Category Grade Standard Region/Area Standard Content
Metals A 4/3 BS 4577 England Materials for resistance welding electrodes and ancillary equipment

Chemical composition(mass fraction)(wt.%) of the A 4/3

Element Min Max Similar

Mechanical Properties of steel grade A 4/3

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)
319 (≥) 612 (≥) 44 11 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 412

Physical Properties of steel grade A 4/3

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 - -     0.32 -  
537 314 - 43.3 233   -  
385 - 12 22.2   232 123

Heat Treatment of steel grade A 4/3

Heat treated : 1121°C - 1132°C

Technological Curves of steel grade A 4/3

Cross Reference Table (Equivalent Grade) of A 4/3

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