Walid Stainless, headquartered in Tunis, Tunisia, is a trusted manufacturer and supplier of heat-resistant stainless steel fastening solutions for demanding industrial environments. Their Stainless Steel 309S Nuts are designed for applications requiring excellent resistance to high temperatures, oxidation, and corrosion. With a low carbon content, these nuts provide improved weldability and long-term stability under thermal stress. Manufactured with precision and strict quality control, Walid Stainless ensures accurate threading, consistent strength, and extended service life. Customers rely on Stainless Steel 309S Nuts for secure fastening and dependable performance in high-temperature industrial applications.
Stainless Steel 309S Nuts are produced from an austenitic stainless steel alloy containing approximately 22–24% chromium and 12–15% nickel, with low carbon content. This composition offers excellent oxidation resistance and reduced risk of carbide precipitation at elevated temperatures. These nuts typically exhibit mechanical strength consistent with 309S-grade fasteners and hardness around 170–200 HB. The austenitic structure ensures good toughness, corrosion resistance, and mechanical stability in high-temperature service conditions.
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.
We are providing a wide variety of certifications with our Stainless Steel 309S Nuts in order to satisfy a high quality standard. In our package, commercial invoices, packing lists, fumigation certificates, heat treatment charts, quality assurance plans, and approved laboratory test reports are provided. Besides, test certificate varying specifically for our Stainless Steel 309S Nuts. The set of certificates used by us consists of MTC as per EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and Third-Party Inspection Certificate. It will ensure full satisfaction and satisfaction for our customers and clients that these products carry complete certifications.
Stainless Steel 309S Nuts are widely used in industries exposed to high heat and corrosive environments. Common applications include furnace assemblies, heat exchangers, boilers, petrochemical processing units, power generation equipment, and thermal treatment systems. Their ability to withstand oxidation and maintain strength at elevated temperatures makes them ideal for critical bolted connections. Engineers and maintenance teams rely on 309S Nuts for long service life, safety, and reliable performance. Walid Stainless ensures each nut meets stringent quality standards, supporting dependable operation in extreme industrial environments.
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