Sadiki Metals, located in Kinshasa, Congo, stands out as a top manufacturer and supplier of premium stainless steel products, including Stainless Steel 321H Hollow Bars. These hollow bars are celebrated for their remarkable high-temperature strength, resistance to corrosion, and overall durability, making them perfect for tough industrial applications. The 321H grade is titanium-stabilized, which enhances its ability to resist intergranular corrosion and oxidation, especially at high temperatures. At Sadiki Metals, we take pride in ensuring that every hollow bar adheres to international quality standards and mechanical performance, providing dependable, long-lasting stainless steel solutions for industries that demand high-performance components in challenging conditions.
Stainless Steel 321H Hollow Bars are crafted from an austenitic stainless steel alloy that includes 17–19% chromium, 9–13% nickel, and is stabilized with titanium. This alloy features a higher carbon content (0.04–0.10%) to boost its high-temperature strength. The material showcases impressive tensile strength ranging from approximately 515–750 MPa, yield strength around 205–275 MPa, and elongation exceeding 40%. The 321H hollow bars excel in resisting oxidation, scaling, and intergranular corrosion, ensuring they maintain mechanical stability, toughness, and dimensional integrity even in high-temperature and chemically aggressive 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 |
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 industries that require high-temperature resistance, corrosion protection, and structural reliability. Common applications include chemical processing equipment, heat exchangers, furnace components, turbine shafts, and boiler systems. They are also utilized in aerospace, petrochemical, and power generation sectors where components face thermal cycling and harsh conditions. The unique combination of strength, oxidation resistance, and protection against intergranular corrosion makes these hollow bars an ideal choice for demanding applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Sadiki Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kinshasa, Congo
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