Dhruv Metals, located in Hyderabad, India, has built a solid reputation as a manufacturer and supplier of top-notch Stainless Steel 321H Hollow Bars. They’re known for providing high-quality stainless steel solutions that cater to a variety of industries. With a strong focus on precision, durability, and adherence to international standards, Dhruv Metals delivers 321H hollow bars that boast impressive strength and oxidation resistance, even at high temperatures. Their state-of-the-art manufacturing facilities, along with a skilled team and strict quality control measures, ensure that their products meet the rigorous demands of industrial applications. This makes Dhruv Metals a trusted partner for clients seeking durable and reliable stainless steel hollow bars for critical uses.
Stainless Steel 321H Hollow Bar is a high-carbon variant of stabilized austenitic stainless steel, featuring 17-19% chromium, 9-12% nickel, and titanium, with a carbon content of up to 0.10%. This unique composition enhances its strength at high temperatures and improves creep resistance. The hollow bar delivers a tensile strength of around 515 MPa, a yield strength of 205 MPa, and a good elongation rate of about 40%. It also maintains excellent oxidation resistance up to 900°C and is resistant to intergranular corrosion, making it ideal for extended high-temperature service and welded structures that experience heat stress.
| 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 |
SS 321H hollow bars are widely used in industries like aerospace, petrochemical, power generation, and chemical processing. They are preferred for high-temperature applications due to their excellent thermal stability, oxidation resistance, and resistance to stress-induced cracking at elevated temperatures.
SS 321H hollow bars are typically available in diameters ranging from 25mm to 500mm, with tolerances conforming to ASTM or ISO standards. Common surface finishes include annealed, pickled, and polished, catering to various industrial and aesthetic requirements.
Stainless Steel 321H Hollow Bars find extensive use in high-temperature and high-stress environments where exceptional creep strength and oxidation resistance are essential. You’ll commonly see them in applications like heat exchangers, furnace components, refinery and petrochemical processing equipment, thermal oxidizers, expansion joints, and exhaust manifolds in both the aircraft and automotive sectors. The hollow design not only enhances material efficiency but also reduces weight in fabricated parts, especially where internal flow channels are necessary. Additionally, 321H hollow bars are utilized in pipelines, superheaters, and pressure vessels that operate at elevated temperatures, ensuring durability, structural integrity, and a long service life even under thermal cycling conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Dhruv Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hyderabad , India
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