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France AFNOR NF Z29.9 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: Z29.9 / Z 29.9
Category Grade Standard Region/Area Standard Content
Metals Z 29.9 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 29.9

Element Min Max Similar
Si - 0.9000 -
S - 0.0300 -
P - 0.0300 -
Ni 8.0000 13.5000 -
Mn - 2.5000 -
Cr 28.0000 32.0000 -
C - 0.1500 -

Mechanical Properties of steel grade Z 29.9

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)
249 (≥) 693 (≥) 31 31 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade Z 29.9

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 - -     0.13 -  
954 675 - 44.3 334   -  
689 - 24 11.2   323 244

Heat Treatment of steel grade Z 29.9

Heat treated : 1236°C - 1364°C

Technological Curves of steel grade Z 29.9

Cross Reference Table (Equivalent Grade) of Z 29.9

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