Latham Steel, located in Hamilton, New Zealand, stands out as a top manufacturer and supplier of Stainless Steel 321H Round Bars. They offer high-quality materials that are built for strength, durability, and outstanding resistance to corrosion. The Stainless Steel 321H grade, which is high-carbon and stabilized with titanium, is specifically designed for high-temperature applications, ensuring excellent resistance to intergranular corrosion and creep. Latham Steel takes pride in making sure that each round bar adheres to strict international standards, providing reliable, precise, and long-lasting performance for various industries, including chemical processing, petrochemical, aerospace, and power generation.
These Stainless Steel 321H Round Bars contain about 17–19% chromium, 9–12% nickel, and a higher carbon content than standard 321, all stabilized with titanium. This unique composition helps prevent carbide precipitation during welding or extended exposure to high temperatures, boosting intergranular corrosion resistance. On the mechanical side, 321H bars showcase a tensile strength ranging from 520–750 MPa, yield strength between 205–450 MPa, and good elongation, all while maintaining toughness and dimensional stability under thermal stress. These characteristics make 321H perfect for structural and high-temperature applications where long-term performance is essential.
Standard : 321H / 1.4878
Range : 3.17mm to 350mm dia
Designation : ASTM A276, ASME SA276
Finish : Bright, Black, Polish
Thickness: 4.0mm – 100mm
Type: Bar, Bright Bar, Black Bars, Hex Bar, Square Bar, Rods, Polish Bar, Forged Bar, Round Bar
Length : Random, Fix & Cut Length
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Ti |
| 321H | 0.04 – 0.10 | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 – 19 | 3 – 4 | 9 – 12 | – | 4xC min 0.60% max |
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000, MPa – 205 |
| Elongation | 35 % |
| Size (mm) | 10×10 | 12×12 | 16×16 | 20×20 | 25×25 | 32×32 | 40×40 | 50×50 |
|---|---|---|---|---|---|---|---|---|
| kg/m | 0.81 | 1.16 | 2.06 | 3.22 | 5.03 | 8.24 | 12.87 | 19.60 |
| Standard | SS 321H |
| UNS | S32109 |
| WERKSTOFF NR. / DIN | 1.4878 |
Yes, Stainless Steel 321H Round Bars and Rods can be used for natural gas applications. Their excellent resistance to high temperatures and corrosion makes them suitable for gas processing and pipeline systems.
You’ll find Stainless Steel 321H Round Bars commonly used in furnace components, heat exchangers, turbine parts, exhaust systems, and chemical processing equipment. Their blend of strength, corrosion resistance, and thermal stability guarantees reliable, long-term operation in high-temperature and aggressive environments. Engineers and manufacturers often choose 321H round bars for projects that require minimal maintenance, durability, and consistent performance even in extreme conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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