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At Hazlewood Fasteners in Canberra, Australia, our Copper Nickel 70/30 washers are engineered for marine, offshore, and fluid-handling systems where ordinary materials surrender to corrosion and seawater aggression. Purpose-designed to stabilize bolted joints in saltwater, brine, and bio-active environments, these washers deliver lasting surface protection, secure load distribution, and unmatched metallurgical resilience. From naval vessels and desalination plants to coastal infrastructure and heat-exchange units, Cu-Ni 70/30 washers stand as the strategic armor of marine-grade fastening. When assemblies demand enduring strength, seawater immunity, and unwavering fastening integrity, these washers guarantee stability where corrosion never sleeps.
Copper Nickel 70/30 washers are fabricated from an alloy blend of roughly 70% copper and 30% nickel, fortified with iron and manganese to heighten strength and seawater endurance. This composition provides exceptional defense against pitting, erosion-corrosion, and biofouling, even in high-velocity marine systems. Exhibiting superior thermal stability, strong load-spreading capability, and natural anti-microbial behavior, these washers maintain structural integrity and clamping reliability under cyclic stresses, salt exposure, and mechanical vibration. They remain dimensionally stable and mechanically confident in aggressive, chloride-rich service environments.
Grade | Cu | Mn | Pb | Ni | Fe | Zn |
Cupro Nickel 70/30 | 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 70/30 | 0.323 lb/in3 at 68 F | 2260 F | 50000 psi | 20000 psi | 30 % |
| Specifications | ASTM / ASME SB 61 / 62 / 151 / 152 |
| Dimensions | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
| Size | 1/2” to 12″ |
| Standards | ASTM, ASME Washer, ANSI Washer, DIN Washer, EN Washer, BS Washer etc |
| Grade | Copper & Copper Nickel Nickel 70/30 (C71500) |
| Class | 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN |
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 70/30 washers are essential across shipbuilding, offshore platforms, seawater cooling networks, marine engines, propulsion systems, desalination units, heat-exchanger tubing, coastal power stations, and naval engineering. They protect mating surfaces, reinforce bolt-load distribution, and prevent galvanic degradation in fluid-contact zones and marine assemblies. Ideal for high-moisture, salt-spray, and submerged conditions, these washers ensure joint longevity and anti-corrosion confidence in pipe systems, condenser units, ballast networks, and ocean-exposed infrastructure. Wherever seawater performance, metallurgical compatibility, and long-term fastening security are mission-critical, Cu-Ni 70/30 washers deliver unwavering protection and structural assurance.
Our Copper Nickel 70/30 washers at Hazlewood Fasteners are carefully packed to ensure that they do not lose their quality. These washers are protected and packed separately in hard containers to avoid any harm and contamination from moisture. Proper labeling makes it easier to locate and manage the items for the best results. The packaging process is very accurate to ensure that the washers reach their destination in perfect condition and are usable as soon as they get to the client, which is a clear indication of our dedication to providing high-quality products and excellent services to our clients.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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