Hemi Metals, located in Hamilton, New Zealand, is a reputable manufacturer and supplier of high-quality Stainless Steel 321 Square Bars and Rods, designed for industrial applications that require high-temperature and corrosion resistance. These square bars are crafted with meticulous attention to detail, ensuring precise dimensions, a smooth surface finish, and adherence to international quality standards. Known for their exceptional resistance to intergranular corrosion and outstanding performance at elevated temperatures, Hemi Metals’ SS 321 square bars serve various industries, including aerospace, power generation, petrochemical, and heavy engineering, guaranteeing durability, ease of fabrication, and dependable mechanical performance.
Stainless Steel 321 is composed of about 17–19% chromium and 9–12% nickel, with titanium added to prevent carbide precipitation during high-temperature use. This titanium stabilization enhances resistance to intergranular corrosion post-welding. Typically, SS 321 square bars exhibit a tensile strength of around 515 MPa and a yield strength close to 205 MPa, along with impressive ductility and toughness. In their annealed state, these bars are non-magnetic, offer good creep resistance, and maintain stable mechanical properties even at continuous operating temperatures of up to 870°C.
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 321 | 0.08 max. | 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 | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321 | 1.4541 | S32100 |
| 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 | – | – |
Stainless Steel 321 Square Bars are available in a range of sizes, typically from ¼" to 12" in width. Common finishes include mill finish, polished, and cold drawn.
Yes, Stainless Steel 321 Square Rods can be welded using most standard welding techniques. However, post-weld heat treatment may be required to maintain its properties and prevent sensitization.
Stainless Steel 321 Square Bars are generally non-magnetic in their annealed condition. However, they may exhibit slight magnetic properties if cold-worked.
Stainless Steel 321 Square Bars and Rods find extensive use in high-temperature and welded structural applications where strength and corrosion resistance are paramount. They are frequently utilized in aerospace components, exhaust systems, heat exchangers, furnace parts, and thermal processing equipment. In the petrochemical and power generation sectors, SS 321 square bars are essential for structural frames, support brackets, pressure components, and expansion joints. They are also used in refinery piping supports and high-temperature fabrication assemblies. Their excellent weldability, oxidation resistance, and thermal stability ensure reliable performance in demanding environments.
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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