Harshita Stainless is one of the top manufacturers and distributors of high-grade stainless steel products, with its honor proudly established in Dubai, India. Best known for precision engineering and superior material quality, we excel in producing premium-grade Stainless Steel 309 Nuts capable of withstanding harsh industrial environments. These nuts possess superior strength, corrosion resistance, and thermal stability, making them suitable for high-stakes applications in petrochemical, marine, oil and gas, and other heavy industries. With uncompromising adherence to global standards and unparalleled service back-up, Harshita Stainless ensures long-term dependability and total customer satisfaction for its products in India and exports worldwide.
Stainless Steel 309 Nuts consist of around 23% chromium and 14% nickel combined with traces of manganese and silicon. The balanced mix improves hot endurance and oxidation resistance while retaining stress stability in structure. These nuts have superior mechanical strength, high thermal resistance, and excellent durability, making them appropriate for long-term exposure to temperature and pressure. Their resistance to thermal expansion guarantees dependability in changing conditions. Perfect for welding and fastening in high-temperature conditions, they are a combination of strength with longevity in demanding applications such as furnaces and heat exchangers.
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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An ideal corrosion resistant material for high humidity environments. Stainless steel 309 nuts are available in sizes from M6 to M36, perfect for furnace parts, heat exchangers and industrial applications requiring high thermal resistance.
Stainless steel 309 coupling nuts are used to connect threaded cables under high temperature conditions. Sizes range from M6 to M36, making them suitable for use in furnace parts and heat exchangers, providing durability and heat resistance.
Stainless steel 309 nylon insert nuts make nylon inserts flexible for secure fastening in high temperature environments. Available in sizes from M6 to M24, they are ideal for applications in heat exchangers and industrial furnaces where stability is required.
Stainless steel 309 flange hex nuts for enhanced weight distribution with integrated flanges. Sizes range from M6 to M24, suitable for high temperature applications such as furnace components and heat exchangers, providing both strength and thermal resistance
Heavy duty stainless steel 309 hex nuts are designed for high pressure, high temperature applications. Available in sizes from M6 to M36, they are used in industrial machinery and furnace components, and offer exceptional strength and heat resistance.
Stainless steel 309 square nuts provide large surface area for efficient torque application. Sizes range from M6 to M24, making them suitable for hot environments such as heat exchangers and furnace parts, making them strong and durable.
We ensure complete documentation for our Stainless Steel 309 Nuts to make them transparent and reliable. Documents include a commercial invoice, a packaging list, a fumigation certificate, a heat treatment chart, and a quality assurance plan. It is accompanied by an NABL-approved lab test report, which satisfies stringent standards. Our commitment to quality is supported by various test certificates, like MTC as per EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and a Third-Party Inspection Certificate. These measures will collectively guarantee 100% client satisfaction and confidence in the integrity of our products.
Stainless Steel 309 Nuts are suitable for applications where there is high temperature, high stress and where oxidation as well as corrosion resistance is needed. Typical uses are for furnace parts, heat exchangers, thermal processing equipment, and exhaust systems. High chromium and nickel content gives them hardness and resistance to scaling and hence are best suited for petrochemical plants, power generation plants, and marine constructions. These nuts are commonly used in thermal cycling fastener assemblies, providing reliable connections even in high-temperature conditions. Their long-term maintenance of mechanical properties makes them a best pick for mission-critical applications in high-reliability industrial sectors.
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