Rupal Metals stands out as a top manufacturer and supplier of Stainless Steel 321 Flat Bars in Delhi, India. They provide high-quality, heat-resistant flat bars designed for demanding high-temperature and corrosive environments. SS 321 is a titanium-stabilized austenitic stainless steel, celebrated for its remarkable resistance to intergranular corrosion and oxidation. It’s particularly ideal for welded structures that face continuous heat. Rupal Metals offers SS 321 flat bars in a variety of widths, thicknesses, and finishes, catering to the industrial needs of sectors like aerospace, refineries, chemical processing, and power generation, where mechanical strength and thermal stability are essential.
Stainless Steel 321 Flat Bars mainly consist of Chromium (17–19%), Nickel (9–12%), and Titanium (≥5xC), along with Carbon, Manganese, Silicon, and trace amounts of Sulfur and Phosphorus. The addition of titanium helps prevent carbide precipitation during welding, boosting resistance to intergranular corrosion. SS 321 boasts a tensile strength of around 515 MPa and a yield strength of about 205 MPa. This material retains its strength and oxidation resistance even at high temperatures and exhibits excellent creep resistance. Its flat profile makes machining easy, ensures uniform load distribution, and is suitable for both structural and thermal 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
| 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.
Stainless Steel 321 Flat Bars find extensive use in situations that demand resistance to high temperatures and corrosion from welding. They are commonly used in exhaust systems, heat exchangers, chemical processing tanks, jet engine components, furnace parts, and boiler structures. These flat bars are perfect for reinforcing structures in high-temperature assemblies and welded frameworks found in refineries, thermal processing plants, and power stations. Their flat shape allows for straightforward installation, fabrication, and stability in load-bearing applications. With SS 321’s ability to withstand thermal cycling and intergranular attack, it proves to be a dependable choice for critical applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Rupal Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Delhi, India
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