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Hamad Fasteners, a top-notch manufacturer and supplier based in Riyadh, Saudi Arabia, is well-known for providing high-quality fastening products that are built to last and designed with precision. One of their standout offerings is the Copper Nickel 90/10 washers, which are prized for their remarkable resistance to seawater corrosion, biofouling, and damage from stress. Crafted to meet international standards, these washers ensure reliable performance and a long lifespan even in the toughest environments. With a strong commitment to quality, prompt delivery, and customer satisfaction, Hamad Fasteners proudly supports various industries, including shipbuilding, offshore operations, petrochemical, desalination, and power generation, by offering dependable fastening solutions.
These Copper Nickel 90/10 washers are made up of 90% copper and 10% nickel, with a touch of iron and manganese added to enhance their strength and corrosion resistance. This particular alloy is especially recognized for its outstanding resistance to seawater and brine solutions, making it a fantastic choice for chloride and marine settings. In terms of mechanics, it boasts moderate tensile and yield strength, good toughness, and solid fatigue resistance. The combination of ductility, anti-biofouling properties, and durability guarantees consistent performance in applications that face seawater and harsh conditions.
| 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.
You’ll find these washers widely used in industries that need fastening solutions for environments with constant exposure to marine and chemical elements. Typical applications include shipbuilding, desalination facilities, offshore platforms, heat exchangers, pumps, and seawater piping systems. They’re also found in condensers and marine engineering equipment where corrosion and erosion resistance is crucial. The mix of strength, reliability, and exceptional corrosion resistance makes Copper Nickel 90/10 washers the perfect choice for critical fastening tasks, ensuring long-term safety and efficiency in operations.
Copper Nickel 90/10 washers at Hamad 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.
Hamad Fasteners is one of the Industrial suppliers and manufacturers of quality fasteners in Riyadh, Saudi Arabia, that has spent more than 12 years serving various industries.
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