Chuck Metals, based in Pulau Ujong, Singapore, is a reliable supplier and manufacturer of top-notch stainless steel products, including Stainless Steel 321 Hollow Bars. They’re well-known for providing materials that resist heat and corrosion, catering to a variety of industries such as petrochemical, power generation, aerospace, and manufacturing. Their 321 hollow bars are produced with meticulous precision and rigorous quality control, ensuring they perform exceptionally well even in tough conditions. With a commitment to quick delivery, technical know-how, and customer satisfaction, Chuck Metals has become a go-to choice for stainless steel hollow bar solutions throughout Singapore and Southeast Asia.
Stainless Steel 321 Hollow Bar is an austenitic stainless steel alloy that’s stabilized with titanium, boosting its resistance to intergranular corrosion, particularly after welding or when exposed to high temperatures. Its chemical makeup features chromium (17–19%), nickel (9–12%), and carbon (up to 0.08%), with titanium content being at least five times that of carbon. It boasts a tensile strength of around 75 ksi (515 MPa), yield strength of 30 ksi (205 MPa), and 40% elongation. The 321 alloy delivers excellent mechanical strength, oxidation resistance, and long-lasting stability in high-temperature settings, making it perfect for structural and pressure-bearing applications.
| 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 Bar finds its way into various applications that demand strength, stability, and resistance to heat and corrosion. You’ll commonly see it in exhaust manifolds, furnace components, heat exchanger tubing, and thermal processing systems. The hollow design provides a lightweight solution for load-bearing structures and fluid transfer systems without compromising on strength. Thanks to its titanium stabilization, 321 effectively resists sensitization during welding, making it a great fit for aerospace applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chuck Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Singapore, Singapore
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