Starc Metals stands out as a top-notch manufacturer and supplier located in Canberra, Australia, with a focus on high-quality Stainless Steel 321H Flat Bars. Renowned for their precision, reliability, and exceptional quality, this company ensures that their products meet international standards and cater to the needs of today’s industries. They serve a variety of sectors, including aerospace, chemical processing, power generation, and marine, providing robust and high-performance stainless steel solutions. Thanks to their advanced manufacturing methods, strict quality control, and prompt delivery, every 321H flat bar offers outstanding corrosion resistance, heat resistance, and mechanical strength, making Starc Metals a go-to supplier of stainless steel products not just in Australia, but beyond.
Stainless Steel 321H Flat Bars are a type of stabilized austenitic stainless steel, containing about 17–19% chromium, 9–12% nickel, and a higher carbon content compared to standard 321, along with titanium to help prevent intergranular corrosion. This unique composition grants them remarkable resistance to oxidation, stress corrosion, and high-temperature conditions. With a tensile strength ranging from approximately 515–750 MPa, they also boast excellent toughness and good ductility. Their superior weldability and formability, along with long-term stability under thermal cycling, make 321H flat bars perfect for applications that require strength, durability, and resistance to heat and corrosion.
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
| 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. |
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 321H | 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 321H | 1.4438 | S32109 |
The primary alloying element in Stainless Steel 321H is titanium (Ti), which stabilizes the steel and prevents carbide precipitation during welding. It also contains chromium (Cr) for corrosion resistance and higher carbon content for increased strength at elevated temperatures.
Stainless Steel 321H is most suitable for high-temperature applications in the range of 427°C to 816°C (800°F to 1500°F). It offers excellent oxidation resistance and stability in these temperatures, making it ideal for heat exchangers and furnace components.
Typical dimensions of a Stainless Steel 321H flat bar range from 3mm to 150mm thickness, 25mm to 600mm width, and up to 6 meters in length. These dimensions vary based on manufacturer specifications and customer requirements.
These Stainless Steel 321H Flat Bars find extensive use in industries that demand high heat and corrosion resistance. They are particularly well-suited for chemical processing equipment, heat exchangers, furnace components, pressure vessels, and marine applications. Their ability to maintain strength and resist oxidation at elevated temperatures makes them ideal for sectors like aerospace, power generation, and petrochemicals. Additionally, 321H flat bars are utilized in structural components, machinery parts, and automotive applications that face thermal stress or corrosive environments. The blend of durability, toughness, and thermal stability makes them a reliable choice for various demanding applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Starc Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Canberra, Australia
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