Aung Metals supplies SS 321H hollow bars, adhering to stringent international quality standards through a rigorous testing process. Our skilled production and quality control teams meticulously oversee every stage of manufacturing to ensure the highest quality is achieved. Our quality experts conduct detailed evaluations of the physical, mechanical, and chemical properties of each product. A comprehensive range of tests, including hardness testing, mechanical and chemical analysis, intergranular corrosion resistance, and positive material identification, is performed to validate the product’s performance. Every product is accompanied by thorough test certificates and analysis reports, guaranteeing the utmost quality assurance.
SS 321H hollow bars are composed of chromium (17-19%), nickel (9-12%), and titanium (0.7%), with controlled amounts of carbon (0.04-0.10%), manganese (up to 2%), and silicon (up to 1%). This composition ensures excellent high-temperature strength and resistance to oxidation and corrosion. The mechanical properties include a tensile strength of 515 MPa minimum, yield strength of 205 MPa minimum, and elongation of 40%. The material exhibits excellent toughness and durability, making it suitable for demanding applications in the chemical, aerospace, and thermal processing industries.
| 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.
SS 321H hollow bars are widely used in high-temperature and corrosive environments due to their excellent strength and resistance to oxidation. They are ideal for applications in the aerospace, chemical, and petrochemical industries, including heat exchangers, boiler tubes, and pressure vessels. Their superior intergranular corrosion resistance makes them suitable for handling acidic and alkaline environments. Additionally, these hollow bars are used in thermal processing equipment, exhaust manifolds, and automotive components where durability and high-temperature performance are critical. SS 321H is a preferred choice for demanding engineering applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Aung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Naypyidaw, Myanmar
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