The content of 18Cr and Si secures oxidation resistance. The addition of Ti and Nb and the reduction of C and N improve high temperature strength, weldability, and formability.
Chemical compositions and physical properties
Designations
Chemical compositions (%)
Mechanical properties
Physical properties
JIS
POSCO
C
Cr
Ni
Mo
Orthers
Yield
Strength
N/mm²
Tensile
Strength
N/mm²
Elongate
%
Hadness
Hv
Specific
Heat
J/gºC
Specific
Gravity
Thermal
Expansion
Coefficient
W/m-ºC
Thermal
Conductivity
W/m-ºC
441
441
≤0.03
17.5~18.5
-
-
Ti 0.1~0.6
≥320
≥470
≥32
≤165
0.46
7.75
6.5
24.9
Applications
- Auto exhaust system: Heat-resistant parts such as exhaust pipes, front pipe and adapter.
