Latham Steel, located in Hamilton, New Zealand, stands out as a top manufacturer and supplier of Stainless Steel 321 Flat Bars. They provide high-quality materials that are built to last, offering impressive durability, strength, and outstanding resistance to high-temperature corrosion. The Stainless Steel 321, which is stabilized with titanium, is perfect for applications that need protection against intergranular corrosion and thermal stress. Latham Steel makes sure that every flat bar adheres to strict international standards, guaranteeing precise dimensions, consistent quality, and long-lasting performance for various industries, including petrochemical, chemical processing, aerospace, and power generation.
These Stainless Steel 321 Flat Bars are made up of about 17–19% chromium, 9–12% nickel, and a carefully controlled amount of titanium for stabilization. This specific alloying helps prevent carbide precipitation during welding or when exposed to high temperatures for extended periods, enhancing resistance to intergranular corrosion and oxidation. In terms of mechanical properties, 321 flat bars boast a tensile strength ranging from 515 to 750 MPa, a yield strength between 205 and 450 MPa, and excellent toughness, maintaining their dimensional stability even in high-temperature conditions.
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
Range : Range – 3.17mm to 350mm dia
| 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 |
| 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. |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321 | 1.4541 | S32100 |
The primary alloying element in Stainless Steel 321 is chromium, typically comprising around 17-19%. Chromium provides corrosion resistance, while titanium is added to improve high-temperature stability and prevent carbide precipitation during welding or prolonged exposure to elevated temperatures.
Stainless Steel 321 is most suitable for temperatures ranging from 800°F to 1500°F (427°C to 815°C). It excels in high-temperature environments due to its titanium stabilization, which prevents carbide precipitation and maintains corrosion resistance under prolonged heat exposure.
Typical dimensions of Stainless Steel 321 flat bars vary, with widths ranging from 20 mm to 150 mm, thicknesses between 3 mm and 50 mm, and lengths up to 6 meters, customizable based on specific requirements.
You’ll find Stainless Steel 321 Flat Bars commonly used in furnace components, heat exchangers, exhaust systems, turbine parts, chemical processing equipment, and structural applications that face high temperatures. Their unique blend of corrosion resistance, thermal stability, and mechanical strength makes them a go-to choice for challenging operational environments. Engineers and manufacturers often opt for 321 flat bars when they need long-term reliability, low maintenance, and consistent performance in extreme heat and corrosive settings.
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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