ASTM A240 321 is Ni-Cr-Ti austenitic stainless steel, its performance is very similar to 304, but due to the addition of metal titanium, it has more better grain boundary corrosion resistance and high temperature strength. The formation of chromium carbide is effectively controlled by adding titanium metal.
ASTM A240 321 stainless steel is superior to 304 stainless steel in stress Rupture and Creep Resistance stress mechanical properties. ASTM A240 321 stainless steel is suitable for manufacturing high temperature welding components.
ASTM A240 321 chemical composition
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
N |
|
A240 321 |
0.08 |
2.00 |
0.045 |
0.030 |
0.75 |
17.0-19.0 |
9.0-12.0 |
0.10 |
ASTM A240 321 mechanical properties
|
Grade |
Tensile strength, min Mpa |
Yield strength, min Mpa |
Elongation in 2 in % |
Hardness, max |
|
Brinell |
Rockwell B |
|
A240 321 |
515 |
205 |
40 |
217 |
95 |
ASTM A240 321 stainless steel has good wear resistance in organic acid and inorganic acid of different concentration and temperature, especially in oxidizing medium. It is used to manufacture lining and conveying pipeline of wear-resistant acid container and wear-resistant equipment such as petroleum exhaust gas combustion pipes, heat exchangers, heating furnace components, boiler pressure vessels, chemical transport vehicles, etc.
