Sadiki Metals, located in Kinshasa, Congo, has built a solid reputation as a reliable manufacturer and supplier of top-notch stainless steel products, including Stainless Steel 321 Hollow Bars. These hollow bars are celebrated for their outstanding corrosion resistance, impressive high-temperature strength, and remarkable durability, making them perfect for tough industrial applications. The 321 grade is titanium-stabilized, which helps prevent intergranular corrosion during welding and when exposed to high temperatures. At Sadiki Metals, we take pride in ensuring that every hollow bar adheres to international quality standards, precision, and mechanical performance, delivering dependable and long-lasting solutions for industries that demand high-performance stainless steel components.
Stainless Steel 321 Hollow Bars are crafted from an austenitic stainless steel alloy that includes 17–19% chromium, 9–13% nickel, and titanium stabilization, all while keeping the carbon content low (≤0.08%). This unique composition grants them excellent resistance to intergranular corrosion, oxidation, and scaling at elevated temperatures. The material boasts a tensile strength ranging from approximately 515–750 MPa, a yield strength of about 205–275 MPa, and an elongation exceeding 40%. With their ability to maintain high-temperature strength, toughness, and dimensional stability, 321 hollow bars are well-suited for critical applications that face mechanical and thermal 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 321 | 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 |
The addition of titanium in SS 321 stabilizes carbon, preventing the formation of chromium carbides at grain boundaries. This reduces the risk of intergranular corrosion, improving the alloy's resistance to corrosion in high-temperature environments and aggressive chemical conditions.
In aerospace, SS 321 Hollow Bar is used for exhaust systems, jet engine components, and fuel systems due to its high-temperature resistance. In the chemical industry, it's used for heat exchangers, reactors, and piping in corrosive environments.
Stainless Steel 321 Hollow Bars find extensive use in industries that require exceptional high-temperature performance and corrosion resistance. Common applications include chemical processing equipment, heat exchangers, furnace components, turbine parts, and boiler systems. They are also utilized in aerospace, petrochemical, and power generation sectors, where components are subjected to thermal cycling and harsh environments. The alloy’s resistance to oxidation and intergranular corrosion makes 321 hollow bars an excellent choice for producing reliable, long-lasting components.
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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