Duplex Steel Nuts are top-notch fastening components crafted for situations that demand outstanding strength, impressive corrosion resistance, and lasting durability. Made from duplex stainless steel, these nuts boast a distinctive dual-phase microstructure that strikes a perfect balance between mechanical toughness and corrosion protection. They’re a go-to choice in environments with chlorides, chemicals, and seawater, thanks to their remarkable resistance to pitting and crevice corrosion. With their high tensile strength and stability under pressure, these nuts are perfect for heavy-duty industrial tasks. You’ll find Duplex Steel Nuts securing systems in the oil & gas, petrochemical, marine, desalination, and power generation sectors.
Duplex Steel Nuts are made from a ferritic-austenitic alloy that includes about 22–25% chromium, 5–8% nickel, and 3–4% molybdenum, with a touch of nitrogen for added strength. This blend enhances resistance to stress-corrosion cracking while providing excellent hardness and impressive tensile and yield strength. The dual-phase structure gives these nuts superior toughness and rigidity compared to standard stainless steels. Plus, duplex steel maintains stable mechanical properties even at high temperatures and stands up to aggressive chemicals and chlorides, making them perfect for demanding applications where strength and corrosion resistance are essential.
| Duplex Steel Nuts | 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 % |
| Specifications | ASTM A479 & ASME SA479 |
| Standard | DIN, ASTM, BS and all International Standards |
| Length | 3 to 200 MM |
| Duplex Steel Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Duplex Steel 2205 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
Duplex Steel Nuts find their place in industries that face tough, corrosive, and high-pressure conditions. In marine and offshore settings, they play a crucial role in securing components within seawater systems, platforms, and subsea equipment. The oil and gas industry counts on these nuts for pipelines, valves, pumps, and drilling machinery, thanks to their excellent resistance to chlorides. Chemical and petrochemical sectors utilize them in reactors, heat exchangers, and process equipment that handle aggressive substances. Their reliability in such challenging environments makes Duplex Steel Nuts an essential choice for ensuring safety and performance.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
