Semih Metals, based in Istanbul, Turkey, is a reliable manufacturer and supplier of Stainless Steel 321 Hollow Bars. They focus on delivering top-notch stainless steel products that are built for strength, durability, and exceptional resistance to high-temperature corrosion and oxidation. Crafted with precision and cutting-edge manufacturing techniques, all under strict quality control, these hollow bars boast impressive dimensional accuracy, consistent wall thickness, and mechanical reliability. Semih Metals guarantees that their Stainless Steel 321 Hollow Bars meet the rigorous demands of various industries, including chemical processing, petrochemical, aerospace, power generation, and marine, where enduring performance in high temperatures and corrosive settings is essential.
The composition of Stainless Steel 321 Hollow Bars primarily includes iron, chromium (17–19%), nickel (9–12%), and a touch of titanium, along with carbon, manganese, and silicon. The titanium acts as a stabilizer, preventing chromium carbide precipitation during welding, which enhances intergranular corrosion resistance. On the mechanical side, 321 hollow bars provide good tensile and yield strength, outstanding toughness, and dependable performance at elevated temperatures. Their hollow design helps reduce weight while still maintaining strength, making them ideal for high-pressure and structural applications in challenging industrial 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 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.
These Stainless Steel 321 Hollow Bars find their place in a variety of applications that demand strength, corrosion resistance, and weight efficiency. They’re commonly used in heat exchangers, furnace components, boiler tubes, chemical processing equipment, and aerospace structures. Moreover, they play a vital role in marine and offshore applications, power generation systems, and other high-temperature environments where thermal stability and corrosion resistance are crucial. With their blend of mechanical reliability, durability, and resistance to intergranular corrosion, they are a top choice for demanding industrial needs.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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