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Punit Fasteners, based in Delhi, India, stands out as a top manufacturer and supplier of Copper Nickel 90/10 Washers, providing high-quality fastener solutions designed for environments prone to corrosion. These washers are made from premium Cu-Ni 90/10 alloy, meeting global standards like ASTM B151, which guarantees their strength, durability, and ability to withstand harsh conditions. With a strong emphasis on precision engineering, custom sizing, and rigorous quality control, Punit Fasteners serves various industries, including marine, chemical processing, desalination, and power generation. Their dedication to quality, prompt delivery, and technical know-how has established them as a reliable partner for high-performance washer applications in challenging environments.
Copper Nickel 90/10 Washers consist of about 90% copper and 10% nickel, with small amounts of iron and manganese added to boost corrosion resistance and mechanical performance. This alloy provides moderate strength, with a tensile strength of around 400 MPa and a yield strength close to 110 MPa. The washers are known for their excellent ductility, typically showing elongation between 30% and 45%, and they maintain a modulus of elasticity around 140 GPa. Renowned for their stability under pressure and temperature changes, these washers excel in resisting seawater, brine, and mildly acidic environments, making them perfect for critical sealing and support roles.
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
| Copper 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 |
| Copper 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 | Square, Round as per Gauge Etc. |
| Head | Square, Round, Plain |
| 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 Washers are commonly utilized in settings that demand resistance to corrosion, erosion, and biofouling. They play a vital role in the marine industry, being essential for shipbuilding, seawater cooling systems, and offshore structures. In chemical processing and desalination facilities, they ensure tight seals in flanges, pumps, and valves that face brine and acidic conditions. Power generation plants rely on them for use in heat exchangers and condensers. Their non-magnetic and non-sparking characteristics make them ideal for electrical enclosures and instrumentation systems. These washers are preferred for their long-lasting durability and stability under thermal cycling.
Copper Nickel 90/10 washers at Punit Fasteners are packed in a proper manner to ensure that they do not lose their quality. Every washer is protected and packed separately in strong and moisture-proof containers to avoid any harm or contamination. This makes it easier to identify the products and also to handle them since they are well labeled. It is for this reason that our packaging process is very thorough to ensure that the washers get to the customers in the best condition possible and be usable right from the packaging.
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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