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321 stainless steel coil is a stainless steel material used in aircraft and exhaust pipes and has corrosion resistance. 321 stainless steel is a material with excellent high-temperature stress rupture (Stress Rupture) performance and high-temperature creep resistance (Creep Resistance) stress mechanical properties that are better than 304 stainless steel. 321 stainless steel has good corrosion resistance in the atmosphere and is widely used in petrochemical, electric power, bridges, automobiles and other industries.
1. Corrosion resistance: Due to the stable titanium element, 321 stainless steel has better corrosion resistance than ordinary stainless steel. Its ability to resist intergranular corrosion is particularly outstanding, and it can maintain good stability in harsh environments such as high temperature, high pressure, and high humidity.2. Good high temperature performance: 321 stainless steel has high heat resistance, and its operating temperature range is between 425℃~900℃. Under high temperature conditions, because titanium and carbon form a stable TiC compound, it can effectively prevent intergranular corrosion, thereby increasing the service life at high temperatures.3. Good welding performance: 321 stainless steel has excellent welding performance, and the welded joints are not prone to cracks. It is suitable for various welding methods, such as argon arc welding, manual arc welding, etc.4. Easy to process: 321 stainless steel has good processing performance and can be used for hot and cold processing, such as bending, stretching, stamping, etc. At the same time, its surface can be subjected to various treatments, such as polishing, sandblasting, painting, etc.| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | other | |
| 321 | min. | - | - | - | - | - | 17 | - | 9 | - | Ti=5(C+N) |
| max. | 0.08 | 2 | 0.75 | 0.045 | 0.03 | 19 | 12 | 0.1 | 0.7 | ||
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
| Specifications | ASTM A240, ASME SA240 |
| Standard | JIS, ASTM, AISI, GB, EN, DIN |
| Surface | 2B, BA, HL, No. 4, Mirror etc. |
| Finish | Cold rolled, Hot rolled |
| Thickness | 0.3mm–100mm |
| Size | 1000mm, 1219mm, 1250mm, 1500mm, 1524mm, 2000mm |
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