Ti is added to 304 steel to prevent inter-granular corrosion. Applicable to usages at temperature between 430 and 900ºC
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
321
321
≤0.08
9.00~13.0
9.00~13.0
-
Ti5x%Cmin
≥205
≥520
≥40
≤200
0.50
7.93
16.7
16.1
Applications
- Exhaust pipe of aircraft ; Boiler cover ; Heat exchanger ; Boiler pipe
- Some parts that are impossible for heat treatment after welding or assembling
