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Marsh Nickel Alloys is a reputable manufacturer and supplier located in Canberra, Australia, with a focus on high-quality Duplex Steel S31803 Fasteners. These fasteners are designed to offer outstanding strength, durability, and resistance to corrosion, making them perfect for even the toughest industrial settings. At Marsh Nickel Alloys, precision in manufacturing and rigorous quality control are top priorities, ensuring that customers receive consistent and dependable products. Duplex Steel S31803 Fasteners find their place in various industries, including oil and gas, chemical processing, marine, and power generation, where they provide secure and long-lasting fastening solutions for piping systems, pressure vessels, and structural components that face high pressures, corrosive substances, and harsh operating conditions.
These fasteners are made up of about 22% chromium, 5–6% nickel, 3% molybdenum, and trace amounts of nitrogen, blending the best features of austenitic and ferritic stainless steels. This unique composition results in excellent mechanical properties, such as high tensile strength, remarkable toughness, and resistance to stress corrosion cracking, pitting, and crevice corrosion. They maintain their stability even in elevated temperatures and aggressive chemical environments, ensuring reliable performance and long-lasting durability in critical industrial applications.
| Specifications | : | ASTM A182 / ASME SA182 |
| Size | : | 1/8″ NB TO 24″ NB |
| Standards | : | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | : | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | : | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | : | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F6 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex Steel S31803 | 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
At Marsh Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Fasteners in Canberra, Australia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Australia, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex Steel S31803 Fasteners are widely utilized in oil and gas pipelines, chemical and petrochemical facilities, marine engineering, and power generation equipment. They are particularly effective for securing flanges, valves, pumps, and other vital components in high-pressure and corrosive settings. With exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, these fasteners create leak-proof, durable joints. Their impressive mechanical strength, corrosion resistance, and long-term reliability make them indispensable for offshore platforms, refineries, chemical reactors, and heat exchangers that operate under demanding industrial conditions.