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Brian Fasteners, a reputable name in precision fastener manufacturing located in Houston, USA, proudly offers high-quality Duplex Steel S31803 washers designed for tough industrial applications. Crafted from austenitic-ferritic stainless steel, Duplex S31803 provides an impressive blend of strength and resistance to corrosion. These washers excel in high-stress and corrosive settings, delivering outstanding performance in sectors like offshore, petrochemical, chemical processing, and desalination. Brian Fasteners produces S31803 washers according to strict ASTM and international standards, guaranteeing durability, precise dimensions, and reliable performance. Whether you need them for bolted assemblies or structural support, Duplex Steel S31803 washers are a dependable choice for critical applications.
Duplex Steel S31803 washers from Brian Fasteners are made up of around 22% chromium, 5–6.5% nickel, 3–3.5% molybdenum, along with balanced nitrogen and manganese, resulting in a dual-phase microstructure that merges ferritic and austenitic properties. These washers boast high yield strength—twice that of standard austenitic stainless steels—along with excellent resistance to stress corrosion cracking and robust protection against pitting and crevice corrosion in chloride-rich environments. Manufactured in accordance with ASTM A240 / A182 specifications, S31803 washers undergo rigorous testing for mechanical strength, hardness, corrosion resistance, and dimensional tolerances, ensuring they stand the test of time in highly aggressive conditions.
| Grade | Duplex Steel UNS S31803 / S32205 |
| Specifications | ASTM A 479 ASME SA 479 |
| Dimension | DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Types | Star Washer, Flat Washer, Lock Washer, Slot Washer, Machine Washer, Sealing Washer, Split Washer, Dome Tooth Washer, Countersunk Washer, Tab Washers, Spherical Washer, Square Washer, Spring Washer, Round Washers, Square Washers etc |
| S31803 / S32205 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| S31803 / S32205 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
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.
Duplex Steel S31803 washers from Brian Fasteners find extensive use in offshore platforms, oil and gas pipelines, petrochemical facilities, heat exchangers, desalination systems, and chemical processing equipment. Their remarkable resistance to chloride stress corrosion cracking, erosion, and fatigue makes them perfect for marine environments, pressure vessels, and water treatment plants. These washers are often paired with Duplex fasteners, ensuring a reliable and effective solution for various applications.
At Brian Fasteners, we prioritize the safety and quality of our Duplex Steel S31803 washers during delivery. Each washer is thoroughly inspected and individually wrapped in protective packaging to prevent damage. They are then placed in tightly labeled boxes with product details and detailed quantities. Our packaging is designed to protect the environment and physical impact, ensuring that your high-performance washer arrives in prime condition and ready for immediate use.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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