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Boikanyo Sheets and Plates, located in Cape Town, South Africa, is a well-respected manufacturer and supplier of stainless steel 321 foils. These foils are celebrated for their exceptional resistance to oxidation, corrosion, and high-temperature scaling. The company specializes in producing precision-engineered foils that blend excellent formability, strength, and weldability, making them perfect for tough industrial applications. Using advanced cold rolling and annealing techniques, Boikanyo’s 321 stainless steel foils boast superior surface quality and consistent dimensions, catering to industries like aerospace, petrochemical, automotive, and thermal processing with dependable performance and a long lifespan.
Stainless steel 321 foils are titanium-stabilized austenitic stainless steels that contain 17–19% chromium, 9–12% nickel, and titanium (which is at least five times the carbon content). The addition of titanium helps prevent carbide precipitation during welding and exposure to high temperatures, ensuring corrosion resistance and structural integrity. These foils have a tensile strength ranging from 515 to 675 MPa and a yield strength between 205 and 310 MPa, along with impressive creep and oxidation resistance up to 870°C. Their fine grain structure allows for excellent flexibility and ease of fabrication.
| Item | Stainless Steel 321 foil(Hot rolled, cold rolled) | |
| Thickness | 0.025 to 3 mm and as per Customer Requirement | |
| Width | 3 mm to 2000 mm and as per Customer Requirement | |
| Length | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc | |
| Standard | JIS, AISI, ASTM, GB, DIN, EN, etc | |
| Surface | the surface and finish of stainless steel 321 foil: 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(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 % |
DIN 1.4541 Foils offer several advantages, particularly in high-temperature applications. The addition of titanium ensures exceptional resistance to intergranular corrosion, making it ideal for welded structures exposed to heat. Its excellent oxidation and corrosion resistance allow it to perform reliably in harsh environments. Stainless Steel 321 also offers superior strength, durability, and resistance to scaling, making it suitable for a wide range of industrial applications. The material is highly versatile, with excellent formability and weldability, ensuring its adaptability for use in heat exchangers, reactors, furnaces, and chemical processing equipment.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
You’ll find stainless steel 321 foils in a variety of applications, including heat exchangers, expansion joints, jet engine components, exhaust manifolds, and chemical processing equipment. Their ability to endure high temperatures makes them ideal for situations involving continuous heating and cooling cycles. In the automotive and aerospace sectors, they are often used for thermal shields and insulation layers. Plus, their resistance to intergranular corrosion and smooth finish makes them a great choice for applications that require both high performance and visual appeal, such as flexible ducting, sensor housings, and precision instruments.
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