Chuck Metals, based in Pulau Ujong, Singapore, has earned a solid reputation as a reliable manufacturer and supplier of top-notch stainless steel products, including the Stainless Steel 321H Hollow Bars. They’re well-known for providing dependable, heat-resistant solutions that cater to industries where strength and stability are essential, especially under extreme conditions. Their 321H hollow bars are crafted with precision to meet international standards, making them perfect for applications that demand excellent structural integrity and corrosion resistance. With a robust supply chain, attentive customer service, and deep technical know-how, Chuck Metals stands out as a go-to partner for stainless steel hollow bars in Singapore’s industrial, energy, and processing sectors.
The Stainless Steel 321H Hollow Bar is a high-carbon variant of grade 321, specially stabilized with titanium to fend off intergranular corrosion when exposed to high temperatures. Typically, its composition includes chromium (17–19%), nickel (9–12%), and carbon (0.04–0.10%), along with titanium to prevent carbide precipitation. This alloy is known for its impressive strength and creep resistance in high-heat settings. It usually boasts a tensile strength of 75 ksi (515 MPa), yield strength of 30 ksi (205 MPa), and an elongation of 40%. It retains its structural and mechanical properties even under prolonged thermal stress, making it an excellent choice for pressure-containing components and high-temperature 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 321h | 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 |
SS 321H hollow bars are widely used in industries like aerospace, petrochemical, power generation, and chemical processing. They are preferred for high-temperature applications due to their excellent thermal stability, oxidation resistance, and resistance to stress-induced cracking at elevated temperatures.
SS 321H hollow bars are typically available in diameters ranging from 25mm to 500mm, with tolerances conforming to ASTM or ISO standards. Common surface finishes include annealed, pickled, and polished, catering to various industrial and aesthetic requirements.
Industries such as petrochemical, power generation, chemical processing, and marine engineering frequently utilize Stainless Steel 321H Hollow Bar. Its ability to withstand high temperatures and resist oxidation makes it perfect for crafting parts for heat exchangers, furnace tubes, pressure vessels, superheater tubes, and exhaust systems. The hollow design not only reduces weight but also maintains mechanical strength, making it a smart choice for various 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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