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Boikanyo Sheets and Plates, located in Cape Town, South Africa, stands out as a top manufacturer and supplier of stainless steel 321H sheets and plates. These high-performance materials are specifically crafted to endure extreme temperatures and harsh environments. The company takes pride in producing its 321H sheets and plates with precision, utilizing advanced manufacturing and heat-treatment methods to guarantee outstanding mechanical strength, a smooth surface finish, and reliable dimensional stability. Renowned for their exceptional high-temperature strength and resistance to oxidation, Boikanyo’s stainless steel 321H products find extensive applications in the chemical processing, petrochemical, and heat treatment sectors.
The stainless steel 321H sheets and plates are made from an austenitic stainless steel alloy that includes 17–19% chromium, 9–12% nickel, and titanium (at least five times the carbon content) to prevent carbide precipitation. The “H” designation signifies a higher carbon content (0.04–0.10%), which boosts creep strength and performance at elevated temperatures. These sheets boast a tensile strength ranging from 515 to 675 MPa and a yield strength between 205 and 310 MPa, ensuring excellent thermal stability, corrosion resistance, and weldability, even when exposed to high temperatures for extended periods.
| Specifications | : | ASTM A240 / ASME SA240 |
| Thickness | : | 4mm-100mm |
| Width | : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
| Length | : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc |
| Surface | : | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
| Finish | : | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form | : | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc. |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
| Material | Size | Thickness |
| PLATES & SHEETS | 1000 mm x 2000 mm | 0.1mm To 100 mm Thickness |
| 1220 mm x 2440 mm (4′ x 8′) | ||
| 1250 mm x 2500 mm | ||
| 1500 mm x 3000 mm | ||
| 2000 mm x 4000 mm | ||
| 2000 mm x 2000 mm |
| Surface Finish | Definition | Application |
|---|---|---|
| 2B | Those finished, after cold rolling, by heat treatment, pickling or other equivalent treatment and lastly by cold rolling to given appropriate luster. | Medical equipment, Food industry, Construction material, Kitchen utensils. |
| BA | Those processed with bright heat treatment after cold rolling. | Kitchen utensils, Electric equipment, Building construction. |
| NO.3 | Those finished by polishing with No.100 to No.120 abrasives specified in JIS R6001. | Kitchen utensils, Building construction. |
| NO.4 | Those finished by polishing with No.150 to No.180 abrasives specified in JIS R6001. | Kitchen utensils, Building construction, Medical equipment. |
| HL | Those finished polishing so as to give continuous polishing streaks by using abrasive of suitable grain size. | Building Construction. |
| NO.1 | The surface finished by heat treatment and pickling or processes corresponding there to after hot rolling. | Chemical tank, pipe |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Stainless steel 321H sheets and plates provide excellent corrosion resistance, especially in high-temperature environments. They are extremely durable, resistant to oxidation, and are curing up to 870°C (1600°F). The intergranular corrosion resistance makes them ideal for welding-related applications. The stability of the composite is enhanced by the addition of titanium, which helps prevent carbide precipitation. Stainless steel 321 is also known for its durability, durability and ability to maintain structural integrity under extreme conditions. These properties make it suitable for industries such as aerospace, chemical and power generation.
You’ll find stainless steel 321H sheets and plates widely used in high-temperature applications, including heat exchangers, furnace components, exhaust systems, refinery equipment, and boiler casings. Their ability to resist intergranular corrosion and scaling makes them perfect for environments that experience frequent heating and cooling cycles. Additionally, they are utilized in chemical processing plants, jet engine components, and pressure vessels. With a combination of strength, durability, and oxidation resistance, 321H sheets and plates deliver dependable performance in both structural and high-stress industrial settings.
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