Al Summan Metals provides SS 321 hollow bars, that meets rigorous international quality standards via a thorough testing process. Our skilled production and quality control teams oversee every phase of manufacturing, guaranteeing that top quality is upheld. Our quality specialists carefully assess the physical, mechanical, and chemical characteristics of each item. A variety of tests, such as hardness testing, mechanical and chemical analysis, intergranular corrosion resistance, and positive material identification, are performed to confirm the product’s performance. Each product comes with complete test certificates and analysis reports, guaranteeing the utmost level of quality assurance.
SS 321 hollow bars consist mainly of iron, with chromium (17-19%) and nickel (9-12%) serving as the principal alloying components. Including titanium (≤0.70%) improves protection against intergranular corrosion. This alloy provides outstanding strength, toughness, and oxidation resistance, which makes it well-suited for high-temperature uses. Its mechanical characteristics feature a tensile strength of 515-725 MPa, yield strength of 205 MPa, and elongation of 40% in 50 mm. Additionally, it retains good weldability and withstands scaling and sensitization at temperatures reaching 900°C.
| 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 chromium carbides from forming at grain boundaries. This lowers the risk of intergranular corrosion, enhancing the alloy's ability to resist corrosion in high-temperature settings and harsh chemical conditions.
In aerospace applications, SS 321 Hollow Bar serves in exhaust systems, jet engine parts, and fuel systems thanks to its resistance to high temperatures. Within the chemical sector, it finds use in heat exchangers, reactors, and piping operating in corrosive settings.
SS 321 hollow barsare extensively utilized in high-temperature settings owing to their outstanding resistance to oxidation and intergranular corrosion. Typical applications encompass heat exchangers, pressure vessels, chemical reactors, and furnace components, where the material encounters high temperatures. They are additionally employed across the aerospace, petrochemical, and automotive sectors for parts demanding strength, durability, and resistance to harsh environments. Furthermore, SS 321 hollow bars are well-suited for welded structures and can endure corrosive conditions, rendering them appropriate for both structural and high-stress applications.
Our products are supplied with mill test certificates as well as third-party test certificates, guaranteeing the highest levels of quality and compliance.
Al Summan Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Dubai, UAE
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