Phehlukwayo Metal, a reputable manufacturer and supplier located in Cape Town, South Africa, specializes in top-notch **Stainless Steel 321 Hollow Bars** designed for durability, high-temperature performance, and outstanding corrosion resistance. Crafted with cutting-edge techniques, these hollow bars guarantee excellent dimensional accuracy, a smooth surface finish, and dependable mechanical strength. Renowned for their ability to resist intergranular corrosion and oxidation, Stainless Steel 321 Hollow Bars are perfect for demanding industrial and chemical applications. Phehlukwayo Metal is dedicated to providing stainless steel products that adhere to international quality standards, catering to industries like chemical processing, petrochemical, aerospace, and power generation with long-lasting, high-performance solutions.
Stainless Steel 321 Hollow Bar is an austenitic stainless steel primarily made up of iron, chromium (17–19%), nickel (9–13%), carbon (0.08% max), and titanium to stabilize the structure. This unique composition offers remarkable high-temperature strength and corrosion resistance, especially in environments susceptible to intergranular attack. The material boasts a tensile strength of around 515–620 MPa, yield strength of 205–275 MPa, and exceptional toughness. Its ferrite-free austenitic structure ensures stability at high temperatures and prevents carbide precipitation along grain boundaries, making it ideal for critical applications that require long-term durability and mechanical reliability.
| Standard | ASTM A276 / A479, ASME SA276 / A479 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc |
| 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 % |
| Denstiy lbm/in3 | Coefficient of Thermal Expansion (min/in)-°F | Thermal Conductivity BTU/hr-ft-°F | Specific Heat BTU/lbm -°F | Modules of Elasticity (annealed)2-psi | |
|---|---|---|---|---|---|
| at 68 °F | at 68 – 212°F | at 68 – 1832°F | at 200°F | at 32 – 212°F | in tension (E) |
| 0.286 | 9.2 | 20.5 | 9.3 | 0.12 | 28 x 106 |
The addition of titanium in SS 321 stabilizes carbon, preventing the formation of chromium carbides at grain boundaries. This reduces the risk of intergranular corrosion, improving the alloy's resistance to corrosion in high-temperature environments and aggressive chemical conditions.
In aerospace, SS 321 Hollow Bar is used for exhaust systems, jet engine components, and fuel systems due to its high-temperature resistance. In the chemical industry, it's used for heat exchangers, reactors, and piping in corrosive environments.
Stainless Steel 321 Hollow Bar finds extensive use in applications that require high strength, thermal stability, and corrosion resistance. It’s commonly utilized in the production of furnace components, heat exchangers, boiler tubes, chemical processing equipment, and machinery in petrochemical plants. The alloy is also well-suited for aerospace components and power generation equipment that face high-temperature corrosive conditions. Furthermore, Stainless Steel 321 Hollow Bars are employed in piping systems and pressure vessels, ensuring robust performance in challenging environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phehlukwayo Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Cape Town, South Africa
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