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France AFNOR NF Z25.20 Welding consumables. Covered electrodes for manual metal arc welding of stainless and heat resisting steels. Classification and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Z25.20 / Z 25.20
Category Grade Standard Region/Area Standard Content
Metals Z 25.20 NF A81-343 France Welding consumables. Covered electrodes for manual metal arc welding of stainless and heat resisting steels. Classification

Chemical composition(mass fraction)(wt.%) of the Z 25.20

Element Min Max Similar

Mechanical Properties of steel grade Z 25.20

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)
564 (≥) 335 (≥) 14 21 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade Z 25.20

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 - -     0.12 -  
528 719 - 23.3 113   -  
526 - 31 42.2   434 313

Heat Treatment of steel grade Z 25.20

Heat treated : 1328°C - 1136°C

Technological Curves of steel grade Z 25.20

Cross Reference Table (Equivalent Grade) of Z 25.20

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