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Punit Fasteners is a leading manufacturer and supplier of Copper Nickel 90/10 Stud Bolts in Delhi, India. Our stud bolts are made from high-quality Cu-Ni 90/10 alloy, designed for high corrosion resistance and mechanical stability in marine and industrial settings. Built to meet ASTM B151 and other international standards, these bolts perform well in saltwater, brine, and chemical environments. We offer a variety of sizes and threading options tailored to customer needs. Punit Fasteners ensures top-quality, precision machining, and reliable performance for use in offshore, power, and desalination projects globally.
Copper Nickel 90/10 Stud Bolts contain 90% copper and 10% nickel, with small amounts of iron and manganese for enhanced strength and corrosion resistance. These bolts have a tensile strength of about 350 to 450 MPa and good elongation properties, allowing flexibility in dynamic applications. Their Brinell hardness typically ranges from 70 to 90. They offer excellent corrosion resistance in seawater and moderately acidic environments. Thermal stability and resistance to biofouling make them suitable for long-term installation in marine and industrial systems. Their composition ensures durability and longevity in high-moisture or corrosive situations.
| 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 Stud Bolts are ideal for marine engineering, shipbuilding, and offshore platforms due to their high resistance to saltwater and fouling. They are used in seawater-cooled condensers, pipelines, desalination units, and heat exchangers. In the power and chemical industries, these bolts are employed in systems exposed to chlorides, acids, and high temperatures. They also serve in firewater systems and hydraulic lines where reliability is key. These bolts offer non-sparking, thermally stable performance, making them suitable for hazardous settings. Their strength and corrosion resistance ensure a secure, long-lasting fastening solution in critical systems.
Our Stud Bolts Copper Nickel 90/10 at Punit Fasteners are packed in a way that retains their quality. Stud bolts are protected and packed individually in moisture proof containers to avoid any harm or contamination to the bolts. Proper labeling makes identification and handling to be easy since anyone can identify the product just by looking at the label. The packaging process ensures that the stud bolts are properly packed to ensure that they are not damaged during transport and are ready for use as soon as they get to the end user, thus our promise of quality product and excellent customer service.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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