Stainless Steel 321H Hollow Bar is well-known for its impressive high-temperature strength, resistance to corrosion, and overall durability, making it a top choice for tough industrial and engineering tasks. This titanium-stabilized austenitic stainless steel, which has a higher carbon content than its counterpart 321, effectively resists intergranular corrosion and keeps its structural integrity even at elevated temperatures. The hollow bar design not only lightens the load but also maintains mechanical strength, making it perfect for shafts, tubing, and precision components used in aerospace, chemical processing, and high-temperature machinery. With its long service life and dependable performance, Stainless Steel 321H Hollow Bar is a go-to option for industries that operate in challenging environments.
This material is primarily made of iron, featuring about 17–19% chromium, 9–12% nickel, and titanium additions that help stabilize the steel. The increased carbon content boosts strength at high temperatures, while the titanium works to prevent chromium carbide precipitation during welding or extended heat exposure. It boasts excellent tensile strength, ductility, and resistance to oxidation and corrosion in high-temperature settings. The hollow bar shape allows for weight reduction without sacrificing performance, making Stainless Steel 321H Hollow Bar perfect for high-temperature piping, structural components, and mechanical applications that demand precision, strength, and corrosion resistance.
| 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 Bar is widely utilized in sectors like chemical processing, aerospace, power generation, and high-temperature industrial applications. Its outstanding resistance to corrosion and oxidation makes it ideal for heat exchangers, furnace components, exhaust systems, pressure vessels, and piping systems that operate under high temperatures. The hollow design promotes efficient material use while ensuring structural integrity, supporting industries such as aerospace and petrochemical.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Junaid Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Manama, Bahrain
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