321 and 321H has high corrosion resistance after heating treatment. 321 is suitable for high temperature up to 900℃. Belonging to austenitic grade, 321 is professional in forming and welding. By applying 321 stainless steel, the process of post-weld annealing can be omitted. The toughness of 321 stainless steel can be also excellent even placed in a cryogenic temperatures.
321 stainless steel plate is a ferritic stainless steel plate with stable titanium and carbon content. It has good corrosion resistance and high-temperature strength. It is usually used in high-temperature corrosion-resistant environments, such as heat treatment equipment, chemical equipment, etc. 321H stainless steel plate is a high-carbon version of 321 stainless steel plate. It has higher high temperature resistance and is suitable for use in higher temperature environments. It is often used in high-temperature stoves, furnace tubes and other fields.
Corrosion Resistance: Similar to 304, the annealed condition of 321 is even better in the temperature. In the condition of warm chloride environments, it is prone to pitting and crevice corrosion. In the condition above about 50℃, stress corrosion cracking can be easily happened.321 and 321H stainless steel plates have good resistance to ordinary corrosion and can resist corrosion from most organic acids, inorganic acids and alkaline solutions, such as nitric acid, sulfuric acid, hydrofluoric acid, etc. It can effectively resist corrosion under oxidation and reduction conditions in medium and low temperature environments and extend the service life of materials.
Heat Resistance: At the temperature range from 900℃ to 925℃, the intermittent service and continuous service have no negative effect on its good oxidation resistance. Under the condition of subsequent aqueous corrosive, the heat resistance of 321 stainless steel also performs well. The heat resistance of 321H is even better, which makes it perfectly suitable for high temperature structural applications.
Stabilizing Treatment: This treatment is after the normal operation, and treat to about 870-890℃ for 2 hours and cooled by the air.
321 and 321H stainless steel plates are typically titanium stabilized, offering improved stability at high temperatures. This stabilization helps prevent inter-granular corrosion and grain coarsening in the welding heat-affected zone, enhancing both corrosion resistance and mechanical properties. These plates exhibit superior stability and heat resistance in high-temperature environments, making them well-suited for applications requiring elevated temperature operation.
Excellent Surface Quality: 321 and 321H stainless steel plates undergo meticulous processing and surface treatment to ensure a smooth finish, minimizing surface defects such as scratches and dents. This enhances the aesthetics and overall quality of the product.
High Quality at a Competitive Price: Despite their exceptional corrosion resistance and high temperature strength, 321 and 321H stainless steel plates are offered at a reasonable price point, catering to user requirements while reducing procurement costs.
Good Processing Performance: These plates exhibit favorable processing characteristics, facilitating conventional cold processing, hot processing, welding, and other manufacturing processes. They are suitable for shaping into various complex forms, thereby streamlining processing challenges and enhancing production efficiency.
Corrosion Resistance
Similar to 304, the annealed condition of 321 is even better in the temperature. In the condition of warm chloride environments, it is prone to pitting and crevice corrosion. In the condition above about 50℃, stress corrosion cracking can be easily happened.321 and 321H stainless steel plates have good resistance to ordinary corrosion and can resist corrosion from most organic acids, inorganic acids and alkaline solutions, such as nitric acid, sulfuric acid, hydrofluoric acid, etc. It can effectively resist corrosion under oxidation and reduction conditions in medium and low temperature environments and extend the service life of materials.
Heat Resistance
At the temperature range from 900℃ to 925℃, the intermittent service and continuous service have no negative effect on its good oxidation resistance. Under the condition of subsequent aqueous corrosive, the heat resistance of 321 stainless steel also performs well. The heat resistance of 321H is even better, which makes it perfectly suitable for high temperature structural applications.
Stabilizing Treatment
This treatment is after the normal operation, and treat to about 870-890℃ for 2 hours and cooled by the air.
321 and 321H stainless steel plates are typically titanium stabilized, offering improved stability at high temperatures. This stabilization helps prevent inter-granular corrosion and grain coarsening in the welding heat-affected zone, enhancing both corrosion resistance and mechanical properties. These plates exhibit superior stability and heat resistance in high-temperature environments, making them well-suited for applications requiring elevated temperature operation.
Property of 321/321H Stainless Steel Sheet/Plate
Chemical Analysis (%) Specified | |||||||||
Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Other |
321 | 0.08 | 1.0 | 2.0 | 0.045 | 0.03 | 17.0 – 19.0 | – | 9.0-12.0 | Ti ≥5*C% |
321H | 0.04 – 0.10 | 1 | 2 | 0.045 | 0.03 | 17.0 – 19.0 | – | 9.0-12.0 | Ti 0.35 |
Grade | Tensile Strength MPa(min) | Yield Strength (0.2% offset) MPa (min) | Elongation % in 50mm (min) | Hardness (max) |
321 | 515 | 205 | 40 | 95 HRB |
321H | 480 | 205 | 29 | 187 Brinell |
Chemical Analysis (%) Specified | |||||||||
Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Other |
321 | 0.08 | 1.0 | 2.0 | 0.045 | 0.03 | 17.0-19.0 | – | 9.0-12.0 | Ti ≥5*C% |
321H | 0.04 – 0.10 | 1 | 2 | 0.045 | 0.03 | 17.0-19.0 | – | 9.0-12.0 | Ti 0.35 |
Grade | Tensile Strength MPa(min) | Yield Strength (0.2% offset) MPa (min) | Elongation % in 50mm (min) | Hardness (max) |
321 | 515 | 205 | 40 | 95 HRB |
321H | 480 | 205 | 29 | 187 Brinell |
Application Of 321/321H Stainless Steel Sheet/Plate
Condenser
Pressure Vessel
Heat Exchanger
Flange