AISI 321 stainless steel is a popular and versatile austenitic stainless steel alloy that is known for its excellent corrosion resistance, high-temperature stability, and favorable mechanical properties. Developed as an evolution of the widely used Grades AISI 304 and AISI 316 stainless steel, AISI 321 offers enhanced resistance to intergranular corrosion, particularly in exposure to elevated temperatures.
AISI 321 stainless steel composed chromium, nickel, and titanium elements, contributing to its great corrosion resistance in various corrosive environments. The addition of titanium provides protection against chromium carbide precipitation during welding and high-temperature applications, making AISI 321 suitable for use in environments where sensitization and intergranular corrosion are concerns.
AISI 321 stainless steel plate is a stable stainless steel whose main advantage is its excellent resistance to intergranular corrosion after exposure to chromium carbide precipitation temperatures in the range of 800°F to 1500°F (427°C to 816°C). AISI 321 stainless steel plate is stabilized by the addition of titanium to form chromium carbide
321 Stainless Steel Plate Specification
| Product Name | AISI 321 stainless steel plate |
| Thickness | 0.3mm-3mm |
| Width | 1000mm-2500mm |
| Length | 2000 mm,2438 mm,3000 mm, 6000 mm,or as requirement |
| Finish | No.1,2B,HL,NO.4,BA,SB,1D,2D,2C,2E,NO.5,NO.8 |
| Technical | Hot rolled, cold rolled |
| MOQ | 1 ton,also support sample order |
| Certification | SGS,ISO |
| Delivery Time | 10 days if have stock,depending on the quanity |
321 stainless steel equivalent
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
AISI 321 Chemical Composition
| Element | 321 | 321H |
| Chromium | 17.00 min.-19.00 max. | 17.00 min.-19.00 max. |
| Nickel | 9.00 min.-12.00 max. | 9.00 min.-12.00 max. |
| Carbon | 0.08 | 0.04 min.-0.14 max. |
| Manganese | 2.00 | 2.00 |
| Phosphorus | 0.045 | 0.045 |
| Sulfur | 0.03 | 0.03 |
| Silicon | 0.75 | 0.75 |
| Titanium | 5 x (C + N) min.-0.70 max. | 4 x (C + N) min.-0.70 max. |
| Nitrogen | 0.10 | 0.10 |
| Iron | Balance | Balance |
AISI 321 Mechanical properties
| Yield Strengtd 0.2% Offset |
Ultimate Tensile Strength |
Elongation in 2 in. |
Hardness | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | (max.) |
| 30,000 | 205 | 75,000 | 515 | 40 | 217 Brinell |
321 Steel Physical Properties
| Density lb/inᶟ | 0.286 |
| Density g/cmᶟ | 7.920 |
| Melting Range | 2550-2635°F/1398 – 1446 °C |
| Thermal Conductivity at 212°F (100°C) | 9.3 BTU/hr/ft²/ft/°F |
| Thermal Conductivity at 212°F (100°C) | 16.0 W/m-°K |
| Electrical Resistivity | 72 Microhm-cm at 20°C |
321 Plate Surface Finish
321 ss sheet is available in various surface finishes, including 2B (cold-rolled, annealed, and pickled), No. 4 (brushed finish), and others, depending on the specific requirements of the application.
321 Sheet Processing Service
321 SS sheet has been precision processed, has good surface quality and flatness, and is easy to cut, bend and weld,has great advantages in factory production, engineering assembly and machining.
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