Neil Metals is a reputable manufacturer and supplier of Stainless Steel 321 Flat Bars, located in Kolkata, India. They provide top-notch stainless steel products that are specifically designed to withstand high temperatures and resist corrosion. The SS 321 flat bars from Neil Metals are celebrated for their outstanding weldability, oxidation resistance, and durability in high-temperature applications. These flat bars find their place in various industries, including aerospace, chemical processing, heat treatment, and power generation. With cutting-edge manufacturing capabilities and a strong commitment to quality, Neil Metals ensures that their Stainless Steel 321 flat bars meet international standards, serving both local and global markets.
The composition of Stainless Steel 321 Flat Bars includes 17–19% chromium, 9–12% nickel, and titanium (at least five times the carbon content) to prevent intergranular corrosion during welding and exposure to high temperatures. This alloy boasts a tensile strength of about 515 MPa and a yield strength of roughly 205 MPa. SS 321 maintains excellent mechanical properties and oxidation resistance up to 870°C, making it perfect for continuous high-temperature applications. It also offers good ductility, formability, and toughness, especially in high-heat settings.
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 are commonly used in applications that require heat and corrosion resistance, particularly after welding. Typical uses include exhaust manifolds, furnace components, expansion joints, heat exchangers, and flue gas systems. The flat bar shape is ideal for structural frameworks, brackets, base plates, and supports in environments that are either high-temperature or corrosive. SS 321 is particularly well-suited for welded structures that are exposed to prolonged heat, where avoiding carbide precipitation is crucial. Its blend of thermal stability, corrosion resistance, and formability makes it a favored choice across a range of industrial and engineering applications.
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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