Dhruv Metals, based in Hyderabad, India, stands out as a trusted manufacturer and supplier of top-notch Stainless Steel 321 Hollow Bars, designed for exceptional performance in high-temperature and corrosive settings. This type of stainless steel is austenitic and stabilized with titanium, which helps prevent intergranular corrosion during welding and prolonged heat exposure. Renowned for its impressive resistance to oxidation and solid mechanical strength, the SS 321 hollow bars from Dhruv Metals are meticulously crafted to adhere to international standards, making them essential for critical applications in sectors like aerospace, chemical processing, and thermal systems.
The composition of Stainless Steel 321 Hollow Bars includes chromium (17.0–19.0%), nickel (9.0–12.0%), carbon (≤0.08%), and titanium (at least five times the carbon content), along with carefully controlled amounts of manganese, silicon, phosphorus, and sulfur. These bars boast a minimum tensile strength of 515 MPa, yield strength of 205 MPa, an elongation of 40%, and a Brinell hardness of up to 217 HB. The titanium content plays a crucial role in preventing carbide precipitation, which enhances both weldability and structural stability under 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 high-temperature applications where resistance to oxidation and scaling is vital. They are commonly utilized in exhaust systems, heat exchangers, furnace components, pressure vessels, and chemical processing equipment. Their hollow design makes them perfect for applications that require strength while minimizing weight, such as in aerospace and marine components. Additionally, SS 321 hollow bars are well-equipped to handle systems that experience thermal cycling and exposure to corrosive chemicals, ensuring reliable performance, a long service life, and excellent fabrication characteristics even in demanding operating conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Dhruv Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hyderabad , India
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