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Yasin Fasteners, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of premium stainless steel fasteners, including the highly regarded Stainless Steel 309/309S Washer. Known for their precision engineering and durability, Yasin Fasteners meets a wide range of industrial needs, delivering products that adhere to international standards. The Stainless Steel 309/309S Washer is designed to offer exceptional resistance to corrosion, high temperatures, and mechanical stress. With a strong commitment to quality, the company ensures that each washer goes through rigorous quality control, making it a trusted choice for the construction, chemical, and manufacturing sectors, where strength and longevity are essential for optimal performance.
These washers are primarily made from iron, chromium (23–25%), and nickel (12–13%), which enhances their oxidation resistance. The 309S variant features a lower carbon content, improving its weldability and minimizing carbide precipitation. They boast impressive mechanical properties, including high tensile strength, good hardness, and resilience at elevated temperatures of up to 1000°C (1832°F). Their corrosion resistance is effective in both acidic and alkaline environments, while their dimensional stability ensures reliable performance even under thermal cycling. The blend of strength, durability, and resistance to scaling makes these washers perfect for demanding industrial applications.
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 use in industries that require components capable of withstanding high temperatures and corrosion. They are particularly suited for furnace assemblies, heat exchangers, boilers, and chemical processing equipment. These washers ensure reliable spacing and load distribution in bolted joints, which helps reduce wear and extend the life of equipment. Additionally, they are utilized in automotive, aerospace, and petrochemical applications where exposure to harsh conditions is common. The 309S variant, known for its superior weldability, is especially ideal for welded assemblies and high-temperature fabrication.
At Yasin Fasteners, our commitment to quality is evident in the rigorous testing of all Stainless Steel 309/309S washers before shipment. We conduct advanced testing, including hardness, chemical analysis by Spectro analysis, good material identification (PMI), levelling, micro-macro, pitting resistance and intergranular corrosion (IGC) testing. In addition, we offer third-party inspection certificates to confirm that our washers meet the highest standards of quality and reliability, ensuring exceptional performance in harsh environments.
Yasin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Istanbul, Turkey, with over 8 years of experience serving global industries.
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