Hemi Metals, located in Hamilton, New Zealand, is a reliable manufacturer and supplier of top-notch Stainless Steel 321H Square Bars and Rods, specifically designed for high-temperature and pressure-critical industrial applications. SS 321H is a titanium-stabilized, high-carbon austenitic stainless steel that enhances strength at elevated temperatures. With a focus on precise dimensions and rigorous quality control, these square bars and rods ensure outstanding mechanical reliability and thermal stability. Hemi Metals caters to industries like power generation, petrochemical, aerospace, and heavy engineering, where high-temperature performance and corrosion resistance are crucial.
Stainless Steel 321H is composed of about 17–19% chromium and 9–12% nickel, featuring a higher carbon content than SS 321, along with titanium stabilization to prevent carbide precipitation. This unique blend offers exceptional resistance to intergranular corrosion and improved high-temperature strength. Typically, SS 321H square bars boast a tensile strength of around 515–620 MPa and a yield strength close to 205–240 MPa, while also providing good ductility and creep resistance. These bars are non-magnetic when annealed and maintain consistent mechanical performance even under prolonged exposure to high temperatures.
Stainless Steel 321H Square Bars Specification :
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 321H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 0.045 max. | 0.03 max. | 0.75 max. |
| Grade | Tensile Str (MPa) min | Yield Str 0.2% Proof (MPa) min | Elong (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321H | 515 | 205 | 40 | 95 | 217 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321H | 1.4438 | S32109 |
| SQUARES | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.62 | 2.05 |
| 18 | 0.79 | 2.59 |
| 20 | 0.76 | 2.49 |
| 22 | 1.18 | 3.87 |
| 25 | 1.52 | 5.00 |
| 28 | 1.91 | 6.27 |
| 30 | 2.19 | 7.20 |
| 32 | 2.50 | 8.19 |
| 36 | 3.16 | 10.37 |
| 38 | 3.52 | 11.55 |
| 40 | 3.90 | 12.80 |
| 45 | 4.94 | 16.20 |
| 50 | 6.10 | 20.00 |
| 56 | 7.65 | 25.08 |
| 60 | – | – |
| 65 | – | – |
| 70 | – | – |
| 75 | – | – |
| 80 | – | – |
| 90 | – | – |
| 100 | – | – |
Yes, Stainless Steel 321H Square Bars are highly corrosion-resistant due to the addition of titanium, which helps prevent sensitization in high-temperature environments. They are ideal for applications in corrosive environments, offering excellent durability.
Stainless Steel 321H Square Rods offer excellent resistance to high-temperature oxidation, excellent weldability, and exceptional strength at elevated temperatures. They are ideal for applications in the chemical, petrochemical, and power generation industries.
Yes, Stainless Steel 321H Square Bars can be customized in size and length to meet specific requirements. Customization options are available based on customer needs for various applications.
Stainless Steel 321H Square Bars and Rods find extensive use in high-temperature and pressure-intensive settings where both strength and corrosion resistance are essential. Common applications include components for boilers, heat exchangers, superheater supports, exhaust systems, furnace parts, and thermal processing equipment. In the petrochemical and power generation sectors, SS 321H is utilized for pressure vessels, pipelines, structural supports, and expansion joints. These square bars are also employed in refinery systems, gas processing units, and aerospace thermal assemblies, thanks to their excellent weldability, oxidation resistance, and creep strength.
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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