Based in Mumbai, India, Harsh Metalloys is a reputable producer and supplier of high-performance 309S stainless steel nuts. These nuts are made with premium raw materials and precise engineering techniques, and they are well-known for their strength, durability, and resistance to corrosive environments and extreme temperatures. SS 309S Nuts, which are made to international standards, are widely used in thermal processing, power generation, and petrochemical industries. Because of their dedication to offering dependable fastening solutions, prompt delivery, and first-rate customer support, Harsh Metalloys is a preferred partner for customers looking for premium stainless steel components in international markets.
With a low carbon content that improves corrosion resistance and lowers carbide precipitation during welding, stainless steel 309S nuts are mainly made of 22–24% chromium and 12–15% nickel. At temperatures as high as 1000°C, these nuts show outstanding resistance to oxidation. Mechanically, SS 309S nuts have 40% elongation, a yield strength of 205 MPa, and a tensile strength of roughly 520 MPa. They are perfect for high-temperature applications because of their strong performance under mechanical and thermal stress, which guarantees structural stability and safe fastening in demanding industrial settings.
Element | Content (%) |
Iron, Fe | 60 |
Chromium, Cr | 23 |
Nickel, Ni | 14 |
Manganese, Mn | 2 |
Silicon, Si | 1 |
Carbon, C | 0.20 |
Phosphorous, P | 0.045 |
Sulfur, S | 0.030 |
Properties | Metric | Imperial |
Tensile strength | 620 MPa | 89900 psi |
Yield strength (@ strain 0.200%) | 310 MPa | 45000 psi |
Izod impact | 120 – 165 J | 88.5 – 122 ft-lb |
Shear modulus (typical for steel) | 77 GPa | 11200 ksi |
Elastic modulus | 200 GPa | 29008 ksi |
Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
Elongation at break (in 50 mm) | 45% | 45% |
Hardness, Brinell | 147 | 147 |
Hardness, Rockwell B | 85 | 85 |
Hardness, Vickers (converted from Rockwell B hardness) | 169 | 169 |
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Corrosion-resistant product designed for high-temperature environments. Stainless Steel 309S Nuts are available in sizes from M6 to M36, ideal for furnace components and industrial applications requiring excellent heat and oxidation resistance.
Stainless Steel 309S Coupling Nuts are used to connect threaded rods in high-temperature settings. Sizes range from M6 to M36, suitable for furnace and kiln applications where durability and heat resistance are essential.
Stainless Steel 309S Nylon Insert Nuts feature a nylon insert to prevent loosening under high temperatures. Available in sizes from M6 to M24, they are ideal for securing components in industrial machinery and furnace applications.
Stainless Steel 309S Flange Hex Nuts offer enhanced load distribution with integrated flanges. Sizes range from M6 to M24, suitable for high-temperature environments such as kilns and industrial equipment, providing both strength and corrosion resistance.
Stainless Steel 309S Heavy Hex Nuts are designed for high-stress, high-temperature applications. Available in sizes from M6 to M36, they are ideal for use in industrial machinery and furnace components, ensuring exceptional strength and thermal stability.
Stainless Steel 309S Square Nuts provide a large surface area for effective torque application. Sizes range from M6 to M24, suitable for high-temperature and industrial applications, ensuring durability and stability in demanding environments.
Because of their exceptional resistance to heat and oxidation, stainless steel 309S nuts are widely used in corrosive and high-temperature environments. Fastening parts in boilers, furnaces, heat exchangers and flue gas systems are typical uses. These nuts are crucial for fastening pipelines, valves, reactors, and other pressure-retaining machinery in the petrochemical and power generation sectors. Thermal processing facilities, industrial ovens, and exhaust systems also use them. Heavy-duty industrial and structural applications rely on SS 309S nuts for dependable fastening solutions where corrosion resistance and mechanical strength are essential.
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