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321 Stainless Steel | Stainless Steel Supply

321 stainless steel is a type of austenitic stainless steel that contains titanium as a stabilizing element. It is similar to 304 stainless steel, but with improved corrosion resistance, particularly in high-temperature environments. The addition of titanium also prevents the formation of chromium carbide during welding, which can cause intergranular corrosion and reduce the material’s durability.

321 stainless steel is commonly used in applications that require high-temperature resistance, such as aircraft exhaust systems, jet engine parts, and chemical processing equipment. It is also used in the manufacturing of equipment for the food and beverage industry, as it is resistant to corrosion from organic acids and fats.

Chemical composition


Note: These values are typical

Mechanical properties

Tensile strengthYield strengthElongation
515 Mpa205 Mpa40%

Note: These values are approximate

Physical properties

Density8.0 g/cm³
Melting Point1398 – 1454 °C
Thermal Conductivity14.6 W/mK at 100 °C
Coefficient of Thermal Expansion16.6 µm/m°C (0-100 °C)
Electrical Resistivity72.0 µohm/cm at 20 °C
Specific Heat Capacity0.50 J/g-°C at 20 °C
Magnetic Permeability< 1.02 (nonmagnetic)

Note: These values are approximate

As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Austenitic type
Ferritic type
Martensitic type

Looking forward to your inquiry!