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France AFNOR NF A4/4 Soudage par résistance - Matériaux pour électrodes et équipements annexes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A4/4 / A 4/4
Category Grade Standard Region/Area Standard Content
Metals A 4/4 NF A82-100 France Soudage par résistance - Matériaux pour électrodes et équipements annexes

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

Element Min Max Similar
Zn - 0.5000 -
Total Others - 0.2000 -
Si - 0.2000 -
Pb - 0.0200 -
Ni - 0.1000 -
Mn - 0.5000 -
Fe 0.5000 1.5000 -
Cu - - -
Al 9.0000 10.0000 -
Zn - 0.5000 -
Total Others - 0.2000 -
Sn - 0.1000 -
Si - 0.2000 -
Pb - 0.0200 -
Ni - 1.0000 -
Mn - 0.5000 -
Fe 0.5000 1.5000 -
Cu - - -
Al 9.0000 10.0000 -
Zn - 0.5000 -
Total Others - 0.2000 -
Sn - 0.1000 -
Si - 0.2000 -
Pb - 0.0200 -
Ni - 1.0000 -
Mn - 0.5000 -
Fe 0.5000 1.5000 -
Cu - - -
Al 9.0000 10.0000 -
Zn - 0.5000 -
Total Others - 0.2000 -
Sn - 0.1000 -
Si - 0.2000 -
Pb - 0.0200 -
Ni - 1.0000 -
Mn - 0.5000 -
Fe 0.5000 1.5000 -
Cu - - -
Al 9.0000 10.0000 -
Zn - 0.5000 -
Total Others - 0.2000 -
Sn - 0.1000 -
Si - 0.2000 -
Pb - 0.0200 -
Ni - 1.0000 -
Mn - 0.5000 -
Fe 0.5000 1.5000 -
Cu - - -
Al 9.0000 10.0000 -

Mechanical Properties of steel grade A 4/4

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)
798 (≥) 478 (≥) 21 32 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical Properties of steel grade A 4/4

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
12 - -     0.43 -  
143 435 - 14.3 114   -  
182 - 24 22.2   112 432

Heat Treatment of steel grade A 4/4

Heat treated : 1352°C - 1351°C

Technological Curves of steel grade A 4/4

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

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