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X 5 NiCrAlTi 31 20

Germany DIN X5NiCrAlTi3120 Seamless circular tubes of austenitic steels for high temperature service; technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals X 5 NiCrAlTi 31 20 DIN 17459 Germany Seamless circular tubes of austenitic steels for high temperature service; technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the X 5 NiCrAlTi 31 20

Element Min Max Similar
Cu - 0.5000 -
Ti 0.2000 0.5000 -
Ni 30.0000 32.5000 -
Nb - 0.1000 -
Cr 19.0000 22.0000 -
Al 0.2000 0.5000 -
S - 0.0100 -
P - 0.0150 -
Mn - 1.5000 -
Si - 0.7000 -
C 0.0300 0.0800 -
Ti 0.2000 0.5000 -
Si - 0.7000 -
S - 0.0100 -
P - 0.0150 -
Ni+Co 30.0000 32.5000 -
Ni 30.0000 32.5000 -
Nb - 0.1000 -
N - 0.0300 -
Mn - 1.5000 -
Cu - 0.5000 -
Cr 19.0000 22.0000 -
Co - 0.5000 -
C 0.0300 0.0800 -
Al + Ti - 0.7000 -
Al 0.2000 0.5000 -
Ti 0.2000 0.5000 -
Si - 0.7000 -
S - 0.0100 -
P - 0.0150 -
Ni 30.0000 32.5000 -
Nb - 0.1000 -
Mn - 1.5000 -
Cu - 0.5000 -
Cr 19.0000 22.0000 -
Co - 0.5000 -
C 0.0300 0.0800 -
Al 0.2000 0.5000 -

Mechanical Properties of steel grade X 5 NiCrAlTi 31 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)
446 (≥) 938 (≥) 23 43 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical Properties of steel grade X 5 NiCrAlTi 31 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
24 - -     0.34 -  
974 615 - 23.3 431   -  
873 - 23 31.2   224 111

Heat Treatment of steel grade X 5 NiCrAlTi 31 20

Heat treated : 1497°C - 1648°C

Technological Curves of steel grade X 5 NiCrAlTi 31 20

Cross Reference Table (Equivalent Grade) of X 5 NiCrAlTi 31 20

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