Adinox Overseas is a trusted name in the stainless steel industry, renowned for delivering premium-quality Stainless Steel 321H Plates that meet global industrial standards. These plates are manufactured using high-grade alloy materials and are ideal for high-temperature applications due to their outstanding mechanical and chemical properties. Our SS 321H Plates conform to ASTM A240 TP321H and bear the universal standard UNS number S32109, making them suitable for a wide range of pressure vessel and structural applications.
Stainless Steel 321H is a high-carbon version of the 321H alloy, specifically developed to enhance high-temperature strength. The elevated carbon content (typically 0.04–0.10%) in SS 321H Plates offers improved creep resistance and better performance under sustained high-heat environments, which makes it especially useful in refinery equipment, heat exchangers, boiler components, and thermal oxidizers. This alloy is titanium-stabilized austenitic stainless steel that exhibits excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 427–816°C.
Our UNS S32109 Stainless Steel Plates are designed to withstand extreme heat and corrosive environments without compromising structural integrity. Due to their superior heat resistance and oxidation resistance, ASTM A240 TP321H Plates are extensively used in chemical processing, oil and gas, petrochemical, and aerospace industries. They also provide a perfect alternative to 304H stainless steel where better strength at elevated temperatures is required.
At Adinox Overseas, we supply 321H Stainless Steel Plates in a wide range of thicknesses, widths, and surface finishes to cater to diverse industrial requirements. Whether you need hot-rolled or cold-rolled stainless steel sheets, our products are manufactured using advanced technology and strict quality control measures to ensure dimensional accuracy, flawless surface finish, and long-lasting performance. We maintain a robust inventory of SS 321H Sheets and Plates, ready to be shipped worldwide to meet urgent project requirements.
| Standard | ASTM A240, ASME SA240 |
|---|---|
| Thickness | 0.1mm to 12 mm Thk |
| Sheet/Plate Size | 1000 mm x 2000 mm, 1220 mm x 2440 mm, 1500 mm x 3000 mm, 2000 mm x 2000 mm, 2000 mm x 4000 mm |
| Surface | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sandblast, Brush, etching. |
| Finish | Hot rolled (HR), Cold rolled (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated), Galvanized etc. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321H | min. max |
0.04 0.10 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
- | 9.0 12.0 |
- | Ti=4(C+N) 0.70 |
| 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 | ||||
| 321H | 515 | 205 | 40 | 95 | 217 |
| 321H also has a requirement for a grain size of ASTM No 7 or coarser. | |||||
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