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The Fasteners Mart in Mumbai, India, is a world-class supplier and exporter of high-quality industrial fasteners to various industries across the globe. We provide various fasteners of good strength and heat resistance such as Stainless Steel 309/309S Nuts. Our austenitic stainless steel-based nuts are of Grade 309/309S with high chromium and nickel content for superior oxidation resistance. Being in hex, square, and other forms, these nuts are well suited to high-temperature conditions as well as corrosive and thermal stress environments.
Stainless Steel 309/309S Nuts contain iron, chromium (22–24%), nickel (12–15%), and less carbon content (particularly in 309S). Their mechanical properties are a tensile strength of approximately 550 MPa and a yield strength of about 205 MPa with an elongation of 40%. Physical properties have a density of 7.9 g/cm³ and a melting range of 1354–1413°C. These characteristics provide durability, heat resistance, and superior corrosion resistance, making them dependable for application in high-temperature and chemically aggressive 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 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 309/309S Nuts find extensive use in heat-treating equipment, furnaces, power plants, chemical processing and petrochemicals, as well as in thermal oxidizers. Their property of resisting oxidation and scaling even at high temperatures makes them find application in fastening at elevated temperatures. Stainless Steel 309/309S Nuts find use in applications involving marine exposures and exhausts, where conditions are prone to corrosive environments. These nuts offer a long-term, reliable fastening option in situations requiring both mechanical strength and corrosion resistance under thermal stress.
The Fasteners Mart provides timely and guaranteed shipping of Stainless Steel 309/309S Nuts to domestic and overseas markets. We provide safe packaging materials such as wooden crates, cartons, and bubble wrap to avoid damage during shipment. Tailor-made packaging solutions are also provided on request to address specific customer requirements and maintain product integrity.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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