Home > Copper Nickel 90/10 Nuts
Majid Fasteners, a well-respected manufacturer and supplier located in Dubai, UAE, specializes in high-quality Copper Nickel 90/10 Nuts that are engineered for outstanding performance in marine and corrosive industrial settings. These nuts are crafted from a durable alloy made up of 90% copper and 10% nickel, which gives them remarkable resistance to seawater corrosion, biofouling, and stress-corrosion cracking. Majid Fasteners is committed to precise machining, rigorous quality control, and compliance with global standards, making their Cu-Ni 90/10 Nuts perfect for shipbuilding, offshore platforms, desalination systems, and industrial cooling applications. Their durability and mechanical stability make them a dependable choice for challenging operating conditions.
Copper Nickel 90/10 Nuts are made from an alloy that consists of about 90% copper and 10% nickel, with small amounts of iron and manganese added to enhance strength and corrosion resistance. This alloy is known for its excellent resistance to seawater, erosion, biofouling, and chloride-induced corrosion. In terms of mechanical properties, Cu-Ni 90/10 nuts provide good tensile strength, high ductility, and reliable toughness, making them effective in high-temperature and high-salinity environments. Their stable metallurgical structure guarantees long-term reliability in marine, offshore, and industrial cooling applications.
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
| Cupro Nickel 90/10 | 88.6 min | 1.0 max | 0.05 max | 9-11 max | 1.8 max | 1 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Cupro Nickel 90/10 | 0.323 lb/in3 at 68 F | 2260 F | 50000 psi | 20000 psi | 30 % |
| Specifications | ASTM B151 / ASME SB151 |
| Standard | DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards |
| Size | M3 – M100 | 3/6″ – 4″ | Custom Sizes |
| Length | 3 mm – 200 mm | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Head | Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc. |
| Neck type | Hex, Square, Triangular, Oval & Knurled etc. |
| Surface Treatment | Passivation /plain |
| Others Factor | OEM, ODM, ±0.03MM tolerance |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing. |
| Packing | IN BULK: carton, pallet, Small Boxes or customer request |
| Surface Coating | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Test Certificate | As per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merk blatt AD 2000 W2 Certified |
| Certification | Dual Certified As per ASTM & ASME Codes |
Copper Nickel 90/10 Nuts are extensively utilized in industries that demand exceptional seawater and corrosion resistance. They play a crucial role in marine engineering, including shipbuilding, propeller systems, seawater piping, and offshore structures. Desalination plants rely on these nuts for brine heaters, evaporators, condensers, and intake systems that are exposed to saline conditions. Additionally, they are used in heat exchangers, power plant cooling systems, and industrial fluid handling equipment. Their strong resistance to biofouling and erosion makes them particularly well-suited for coastal installations.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
