Neil Metals is a well-respected manufacturer and supplier of Stainless Steel 321H Flat Bars, located in Kolkata, India. They provide high-strength, heat-resistant stainless steel solutions tailored for critical industrial applications. With a reputation for precision engineering, rigorous quality control, and a commitment to international standards, Neil Metals produces SS 321H flat bars that are specifically designed for high-temperature environments where outstanding mechanical strength and corrosion resistance are crucial. These flat bars find their place in various industries, including petrochemical, power generation, aerospace, and chemical processing. Thanks to their advanced production capabilities, Neil Metals reliably serves both local and global markets, ensuring prompt delivery.
The composition of Stainless Steel 321H Flat Bars includes 17–19% chromium, 9–12% nickel, and a higher carbon content (0.04–0.10%) compared to standard 321, with titanium added for stabilization. This titanium helps prevent carbide precipitation during welding and exposure to high temperatures, boosting resistance to intergranular corrosion. SS 321H boasts a tensile strength of about 585 MPa and a yield strength of around 275 MPa. It maintains its mechanical strength and oxidation resistance at temperatures reaching up to 870°C, making it an excellent choice for continuous high-heat applications.
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 are commonly utilized in high-temperature and pressure settings where thermal stability and corrosion resistance are vital. Typical applications include heat exchangers, furnace components, boiler parts, pressure vessels, exhaust manifolds, and flue gas systems. The flat bar shape is particularly advantageous for creating structural supports, mounting frames, and base plates in heat-intensive environments. Additionally, SS 321H is frequently used in refinery and petrochemical equipment that experiences regular temperature fluctuations. Its remarkable weldability, creep resistance, and long service life make it a top choice for challenging engineering and fabrication projects.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neil Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kolkata, India
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