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The Fasteners Mart, Mumbai, India, is a well-known name in manufacturing and exporting industrial-grade fasteners to a wide range of industries across the globe. Among our extensive product range, we supply Stainless Steel 309/309S Washers, which are suitable for high-performance applications in harsh environments. These washers, produced from Grade 309 and 309S austenitic stainless steel, are offered in flat, spring, and lock washer configurations. Famous for its superior heat resistance and anti-corrosive performance, these washers are particularly suitable for thermal and corrosive use in tough industrial environments.
309/309S Stainless Steel Washers consist mainly of iron, nickel (12–15%), and chromium (22–24%), with 309S having decreased carbon for increased weldability. Their physical and mechanical properties include tensile strength of approximately 550 MPa and yield strength of 205 MPa with elongation to 40%. Physical properties have a density of 7.9 g/cm³ and melting range of 1354°C to 1413°C. These characteristics render the washers extremely resistant to wear, oxidation, and the ability to sustain mechanical integrity at high temperatures.
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 Washers find extensive application in high-temperature and corrosive conditions like furnaces, heat treatment facilities, chemical processing plants, exhaust systems, and power plants. These washers ensure consistent spacing and load distribution in bolted joints, particularly where thermal stress is an issue. Their scaling and oxidation resistance makes them suitable for continuous operation at temperatures up to 980°C, providing stability and performance in critical equipment and structures in heavy industrial applications.
The Fasteners Mart provides timely and safe delivery of Stainless Steel 309/309S Washers in India and overseas markets. We employ safe packaging techniques, such as cartons, bubble wraps, and wooden crates, for protecting the products while they are in transit. Special packaging solutions can be designed to satisfy client-specific needs and provide the highest possible 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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