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TU Z 6 CNNb 18 12

France AFNOR NF TUZ6CNNb1812 Steel tubes. Seamless or longitudinally welded stainless steel tubes for exchangers in aircraft construction. Dimensions. Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: TUZ6CNNb1812 / TU Z 6 CNNb 18 12
Category Grade Standard Region/Area Standard Content
Metals TU Z 6 CNNb 18 12 NF A49-207 France Steel tubes. Seamless or longitudinally welded stainless steel tubes for exchangers in aircraft construction. Dimensions. Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the TU Z 6 CNNb 18 12

Element Min Max Similar
Si - 1.0000 -
S - 0.0300 -
P - 0.0400 -
Ni 10.5000 13.0000 -
Nb - 1.0000 -
Mn - 2.0000 -
Cr 17.0000 20.0000 -
C - 0.0800 -

Mechanical Properties of steel grade TU Z 6 CNNb 18 12

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)
243 (≥) 474 (≥) 44 14 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical Properties of steel grade TU Z 6 CNNb 18 12

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
22 - -     0.12 -  
651 266 - 44.3 313   -  
165 - 13 21.2   323 421

Heat Treatment of steel grade TU Z 6 CNNb 18 12

Heat treated : 1912°C - 1423°C

Technological Curves of steel grade TU Z 6 CNNb 18 12

Cross Reference Table (Equivalent Grade) of TU Z 6 CNNb 18 12

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