Phehlukwayo Metal, located in Cape Town, South Africa, is a reputable manufacturer and supplier of top-notch Stainless Steel 321H Hollow Bars. These bars are celebrated for their remarkable high-temperature strength, resistance to corrosion, and overall durability, making them perfect for tough industrial and engineering tasks. At Phehlukwayo Metal, they prioritize precision in manufacturing, strict quality control, and compliance with international standards, ensuring that their products deliver reliability, accurate dimensions, and long-lasting performance. Their Stainless Steel 321H Hollow Bars are particularly suited for components that face extreme heat, thermal cycling, and harsh environments, which is why they’re commonly found in industries like aerospace, chemical processing, power generation, and petrochemicals.
The composition of Stainless Steel 321H Hollow Bars includes iron, with 17–19% chromium, 9–12% nickel, 0.04–0.10% carbon, and trace amounts of titanium for stabilization. This austenitic stainless steel is known for its excellent high-temperature strength, outstanding corrosion resistance, and good weldability. In terms of mechanical properties, 321H Hollow Bars boast a tensile strength ranging from 600 to 850 MPa, high yield strength, and impressive ductility. Their unique blend of toughness, thermal stability, and oxidation resistance makes them ideal for components that operate under high temperatures and corrosive conditions.
| 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.
These Stainless Steel 321H Hollow Bars find extensive use in manufacturing heat exchangers, furnace components, boiler tubes, chemical processing equipment, and aerospace parts. Their exceptional resistance to high-temperature corrosion makes them a go-to choice for power generation plants, petrochemical industries, and industrial machinery that endure extreme heat and oxidizing environments. Additionally, they are utilized in structural and mechanical applications where stability, strength, and long-term reliability are crucial. Phehlukwayo Metal’s Stainless Steel 321H Hollow Bars consistently deliver quality, outstanding durability, and dependable performance for even the most demanding industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phehlukwayo Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Cape Town, South Africa
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