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At Hazlewood Fasteners, we take pride in being a trusted manufacturer and supplier of high-quality Copper Nickel 70/30 Bolts in Canberra, Australia. Designed for superior corrosion resistance and long-term durability, these bolts are ideal for marine and industrial applications. The 70% copper and 30% nickel composition provides outstanding protection against seawater, biofouling, and stress corrosion cracking. Known for their excellent mechanical strength and thermal stability, Copper Nickel 70/30 Bolts deliver reliable performance in harsh environments, making them the perfect choice for shipbuilding, desalination plants, and offshore installations where reliability is non-negotiable.
Copper Nickel 70/30 Bolts are made from an alloy containing 70% copper and 30% nickel, with small additions of iron and manganese to enhance strength and corrosion resistance. This composition ensures superior performance against seawater corrosion, erosion, and cavitation. The alloy offers a tensile strength of about 380 MPa and yield strength of around 130 MPa, with excellent ductility and thermal conductivity. These properties make Cu-Ni 70/30 Bolts a preferred material for high-salinity and high-pressure applications, maintaining their integrity and strength over long operational periods.
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
|---|---|---|---|---|---|---|
| Copper Nickel | 65.0 min | 1 max | .05 max | 29-33 | 0.4-1.0 | 1 max |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 372-517 MPa | 54000-75000 psi |
| Tensile strength, yield (depending on temper) | 88.0-483 MPa | 12800-70100 psi |
| Elongation at break (in 381 mm) | 45.0% | 45.0% |
| Charpy impact | 107 J | 78.9 ft-lb |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 20% | 20% |
| Shear modulus | 57.0 GPa | 8270 ksi |
| Poisson’s ratio | 0.34 | 0.34 |
| Elastic modulus | 150 GPa | 21800 ksi |
| Grade | Copper Nickel |
| Specifications | ASTM / ASME SB 151, SB 152 |
| Standards | DIN, ASTM, BS and all International Standards |
| Length | UPTO 5 METERS |
| Size | M4 To M100 | Custom Sizes |
| Form | Bolts |
| Types | Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Counter sunk Bolts |
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 Bolts are widely used in marine engineering, shipbuilding, offshore platforms, heat exchangers, and desalination systems due to their exceptional resistance to seawater and biofouling. They are also commonly used in power plants, chemical industries, and condensers where durability under harsh and saline conditions is essential. These bolts ensure long-lasting performance even in continuous seawater exposure. Hazlewood Fasteners’ Copper Nickel 70/30 Bolts are trusted for their strength, reliability, and corrosion protection — making them a top choice for industries that demand dependable fastening in extreme marine environments
At Hazlewood Fasteners, our Copper Nickel 70/30 Bolts are packed in a way that they reach the clients in the best condition possible. Every bolt is covered and placed in individual well-sealed and moisture proof packages to ensure that they are not contaminated or damaged. Labeling is very important since it makes identification of the items easier and handling is also made easier. The kind of packaging we use ensures that the bolts do not lose their quality and are readily available for use, thereby underlining our policy of offering high-quality products and excellent customer relations.
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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