Neil Metals, a prominent manufacturer and exporter in Kolkata, India, provides top-notch Stainless Steel 321 Hollow Bars for use in applications demanding higher resistance to high temperature and intergranular corrosion. With utmost emphasis on precision, quality, and timely supply, Neil Metals provides 321 hollow bars that are in conformity with international quality and have extensive usage in critical industries including chemical processing, thermal equipment, and aerospace. Their sophisticated manufacturing facilities and customer-oriented policy position them as a reliable source of stainless steel products in domestic as well as international markets.
Stainless Steel 321 Hollow Bar consists of 17–19% chromium, 9–12% nickel, and titanium at least five times the carbon content for stabilization. It contains up to 0.08% maximum carbon content that assists in improving its strength at high temperatures whereas the addition of titanium avoids carbide precipitation when welding. The material possesses tensile strength of approximately 515 MPa, yield strength of 205 MPa, and satisfactory ductility and toughness. Stainless Steel 321 has superior mechanical strength coupled with its resistance to scaling and oxidation, which allows it to be an ideal material for exposure to elevated temperatures for long durations and corrosive atmospheres.
| 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 |
Stainless Steel 321 Hollow Bars find widespread usage in uses that demand continuous or intermittent exposure to high heat. Some of these include exhaust manifolds, heat exchangers, parts used in furnaces, thermal oxidizers, and expansion joints. Their intergranular corrosion resistance makes them ideal for welded components that are subjected to temperatures ranging from 427–816°C. 321 hollow bars are also used extensively in the aerospace, petrochemical, pharmaceutical, and power generation industries. Hollow shape gives material and weight savings with structural integrity retained, thus making these bars well-suited for precision-made heat-resistant parts in high-stress industrial applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neil Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kolkata, India
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