Neil Metals, a well-known manufacturer and supplier in Kolkata, India, provides high-quality Stainless Steel 321H Hollow Bars for various industrial uses. Focused on delivering high-quality products and customer satisfaction, Neil Metals supplies precision-fabricated hollow bars that conform to international quality standards. Stainless Steel 321H is characterized by outstanding resistance to oxidation in high temperatures and intergranular corrosion, and it is best suited for application at elevated temperatures. Neil Metals provides consistent performance, on-time shipment, and competitive rates, which makes them a customer’s best choice when it comes to business in industries like petrochemical, aerospace, thermal processing, and others.
Stainless Steel 321H Hollow Bar consists mainly of 17–19% chromium, 9–12% nickel, and titanium for stabilization, with increased carbon content (0.04–0.10%) compared to regular 321. This composition enhances high-temperature strength and resistance to carbide precipitation. The alloy provides a tensile strength of around 515 MPa, yield strength of 205 MPa, and satisfactory elongation and toughness, even under severe heat conditions. It also exhibits ideal weldability and formability, with suitability for fabrication and structure applications. All these characteristics provide 321H as an ideal choice for application in repeated thermal cycling and high-pressure exposure environments.
| 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 321h | 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 |
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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