Stainless Steel 321 and 321H are popular grades of austenitic stainless steel known for their excellent corrosion resistance, high-temperature strength, and durability. These grades are often used in applications where exposure to elevated temperatures is common, such as in the manufacturing of chemical processing equipment, heat exchangers, and aircraft components.
Stainless Steel 321 is a stabilized version of Stainless Steel 304, containing titanium to prevent chromium carbide precipitation during welding. The addition of titanium also enhances the alloy's corrosion resistance. Stainless Steel 321H is the high-carbon version, offering improved high-temperature strength. The chemical composition of these grades includes chromium, nickel, and a moderate amount of titanium, ensuring a robust combination of mechanical and corrosion-resistant properties.
321/321H Stainless Steel Sheets, Plates, and Coils are widely used in various industries due to their versatility. Sheets are flat-rolled products with thicknesses ranging from 0.3 mm to 6.0 mm, while plates are thicker sections used in heavier applications. Coils, on the other hand, are continuous lengths of flat metal wound into rolls, offering convenience in processing and fabrication.
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One of the key attributes of Stainless Steel 321 Sheet is its exceptional corrosion resistance. These grades exhibit resistance to a wide range of corrosive environments, including acidic and alkaline solutions, making them suitable for applications in chemical processing and petrochemical industries.
Stainless Steel 321H Plate retains its strength at elevated temperatures, making it suitable for high-temperature applications such as furnace components, heat exchangers, and aerospace components. The titanium stabilization in these grades prevents sensitization and intergranular corrosion at elevated temperatures.
SS 321 Shims, thin pieces of material used for spacing and alignment, are essential components in various industries. Stainless Steel 321/321H shims provide excellent corrosion resistance and durability, making them ideal for critical applications where precision and reliability are paramount.
The versatility of Stainless Steel 321 Sheets makes them suitable for a wide range of applications, including chemical processing, aerospace engineering, power generation, and heat exchanger manufacturing. Their combination of corrosion resistance, high-temperature strength, and formability contributes to their widespread use in diverse industries.
ASTM A240, ASME SA240
MSRR, AMS, BS, JIS, AISI, ASTM, GB, DIN, EN, etc
1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm etc.
2000mm, 2440mm, 3000mm, 5800mm, 6000mm etc.
Cold rolled - 0.5-6.4 mm
Hot rolled - 3.0–12.0 mm
Sheet, Plate, Strip, Flats, Clad Plate, Coils, Foils, Plain Sheet, Flat Shim, Flat Sheet, Shim Sheet, Rolling Sheet, Rolling Plate, Rolls, Blank (Circle)
2B, 2D, BA NO (8), Cold rolled sheet (CR), Hot rolled plate (HR), SATIN (Met with Plastic Coated), No.1 finish hot rolled, 1D, 2B, No.4, BA, 8K, satin, hairline, brush, mirror etc.
Half Hard, Soft, Hard, Quarter Hard, Spring Hard
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321 | 1.4541 | S32100 |
| SS 321H | 1.4878 | S32109 |
| Grade | Ni | C | Mn | P | S | Si | Cr | Mo | N | TI | |
| 321 | Max | 12.00 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 19.0 | 3 – 4 | 0.10 max | 0.70 |
| Min | 9.00 | - | - | - | - | - | 17.0 | - | - | 5(C+N) | |
| 321H | Max | 12.00 | 0.08 | 2.00 | 0.045 | 0.030 | 1.75 | 19.0 | 3 – 4 | 0.10 | 0.70 |
| Min | 9.00 | 0.04 | - | - | - | - | 17.0 | - | - | 4(C+N) | |
| 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 |
| 321H | 515 | 205 | 40% | 95 | 217 |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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