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The Fasteners Mart in Mumbai, India is a reliable brand in the industry of fastener manufacturing. We provide Copper Nickel 90/10 nuts that are made of high-quality UNS C70600 alloy containing 90% copper and 10% nickel. The nuts come in hex, square and dome shapes with superior corrosion resistance and perfect performance in marine and industrial applications.
Copper Nickel 90/10 nuts are made up of 90% copper and 10% nickel, along with iron and manganese in trace quantities to enhance strength and resistance to corrosion. The nuts are characterized by good mechanical properties such as tensile strength of 275–400 MPa and yield strength of 69–135 MPa, accompanied by good ductility and elongation. In terms of physical properties they possess a density of 8.89 g/cm³ and a melting point around 1100°C. Their excellent thermal and electrical conductivity and superior resistance to seawater corrosion and biofouling suit them for stringent marine, offshore, and chemical processing 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 |
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.
Copper Nickel 90/10 nuts are widely used in offshore and marine applications because of their excellent seawater corrosion resistance and biofouling. They are widely utilized in ship construction, seawater pipes, desalination units and marine hardware and equipment because of their holding power and fastening capabilities. They are also utilized in power generation equipment, heat exchangers, condensers and chemical processing equipment. Where resistance to high temperature and corrosive environment is essential. Their non-magnetic and spark-resistant nature makes them best suited for sensitive applications in the defense and oil & gas sectors, ensuring safety, reliability and long-term performance in harsh environments.
We take care that each Copper Nickel 90/10 nut passes through rigorous quality testing and secure packaging for damage-free transportation. We conduct tests like mechanical tests, chemical analysis, PMI (Positive Material Identification), hardness testing, and corrosion resistance test to comply with industry standards. For packaging purposes, we utilize heavy-duty materials like bubble wrap, corrugated boxes, and wooden crates to avoid transportation damage. Whether for domestic or overseas delivery, we guarantee prompt shipment and provide tracking assistance, ensuring our customers receive flaw-free, high-quality nuts in ideal condition.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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