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Poang Fasteners is a leading supplier, manufacturer and exporter of stainless steel 309/309S washers known for exceptional corrosion resistance and durability. Our washers are available in various sizes and configurations for their excellent tensile strength and long service life. These books are designed to meet the exacting requirements of many industries, providing reliable performance in ambient and harsh environments.
Poang Fasteners, a top manufacturer and supplier in Da Nang, Vietnam, is well known for delivering high-quality fastening solutions that function consistently in the most challenging environments. Amongst its specialty products, Stainless Steel 309/309S Washers are designed to deliver outstanding strength, high-temperature resistance, and durability. Due to the balance of chromium and nickel content, these washers outperform others in resisting oxidation and corrosion even under harsh heat and pressure. For use in power generation, petrochemical, and chemical applications, Poang Fasteners guarantees that each washer adheres to rigorous global standards and provides customers with reliable fastening solutions constructed for sustained performance.
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 consist of chromium (22–24%) and nickel (12–15%), offering excellent resistance to oxidation, scaling, and corrosion at high temperatures. The 309S type, with reduced carbon content, has improved weldability and reduces carbide precipitation. These washers have superior mechanical strength, high creep, and consistent thermal stability such that they perform well in continuous service conditions to 1093°C. Their high tensile and yield strength, along with superior toughness, make them suitable in heavy-duty applications where both corrosion resistance and high-temperature use are essential.
Stainless Steel 309/309S Washers find extensive application in applications that require uniform performance under harsh environments. In power generation, they are used in heat exchangers, furnaces, and boilers where high-temperature scaling and oxidation resistance are critical. In petrochemicals and chemicals, they hold together parts used in equipment dealing with corrosive and high-temperature processes. Their hardness and ability to withstand rigorous conditions also qualify them for use in refineries, cement plants, and thermal processing facilities. These washers can survive hostile environments and ensure long-term dependability and safety in critical industrial processes where other materials would not last.
Poang Fasteners is a leading manufacturer and supplier of high-quality fasteners in Da Nang, Vietnam, with over 8 years of experience serving global industries.
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