Rupal Metals, based in Delhi, India, stands out as a leading manufacturer and supplier of top-quality stainless steel products, including the reliable Stainless Steel 321 Hollow Bar. Crafted for outstanding performance in high-temperature and oxidizing conditions, these hollow bars are perfect for industrial applications that demand thermal stability and resistance to intergranular corrosion. At Rupal Metals, we emphasize quality, precision, and durability, ensuring our products meet international standards. With a robust network and a client-centered approach, we serve various industries such as chemical processing, aerospace, power generation, and fabrication, delivering dependable solutions for tough operational challenges.
Stainless Steel 321 Hollow Bar is an austenitic stainless steel that’s stabilized with titanium to prevent intergranular corrosion. It generally contains 17–19% chromium, 9–12% nickel, and a small amount of titanium (at least five times the carbon content). This unique composition enhances its resistance to high-temperature oxidation and stress. The alloy boasts a tensile strength of about 515 MPa, a yield strength of 205 MPa, and an elongation of roughly 35%. 321 stainless steel maintains impressive strength and toughness even at elevated temperatures, making it ideal for continuous use in heat-intensive applications while also offering good weldability and formability.
| 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 scenarios where high-temperature performance and corrosion resistance are essential. It’s perfect for heat exchangers, furnace components, thermal processing equipment, and exhaust systems in both the automotive and aerospace sectors. Thanks to its titanium stabilization, it’s particularly beneficial in welded structures that face high heat. Key industries include oil and gas, petrochemicals, refineries, food processing, and power generation. The hollow bar design not only enhances performance but also helps reduce weight, making it a practical choice for various applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Rupal Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Delhi, India
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