Copper Nickel 70/30 Fasteners

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Copper Nickel 70/30 Fasteners Manufacturer and Supplier in Canberra, Australia

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At Hazlewood Fasteners in Canberra, Australia, our Copper Nickel 70/30 fasteners are crafted to excel where seawater, brine, and corrosive marine atmospheres would cripple ordinary hardware. Engineered for the most aggressive coastal, offshore, and desalination environments, these fasteners provide formidable corrosion immunity, biofouling resistance, and metallurgical stability. Whether anchoring piping systems, marine engines, heat-exchange assemblies, or ocean-exposed infrastructure, Cu-Ni 70/30 fasteners deliver uncompromising fastening security and long-term performance. When your installations demand unwavering integrity under salt spray, high-velocity seawater, and constant thermal cycles, our Cu-Ni 70/30 fasteners stand as your trusted marine-grade defense.

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Copper Nickel 70/30 fasteners are manufactured with approximately 70% copper and 30% nickel, strengthened with precise additions of iron and manganese to enhance toughness, erosion resistance, and seawater durability. This alloy exhibits exceptional resilience against pitting, stress-corrosion cracking, and microbial attack, even under turbulent saltwater flow. Offering robust tensile strength, thermal stability, and natural anti-biofouling performance, these fasteners maintain stable torque, consistent preload, and dimensional integrity in high-salinity, high-pressure, and vibration-active environments. They are engineered to outlast conventional alloys in the harshest marine and fluid-service systems.

Copper Nickel 70/30 Fasteners Chemical Composition

Grade	Cu	Mn	Pb	Ni	Fe	Zn
Copper Nickel	65.0 min	1 max	.05 max	29-33	0.4-1.0	1 max

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Copper Nickel 70/30 Fasteners Mechanical Properties

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

Copper Nickel 70/30 Fasteners Specification

Grade	Cupro 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	Nuts, Bolts, Washers, Screw
Types	Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Counter sunk Bolts, Hex Head Nut, Eye Nut, Dome Nut, Coupling Nut, Square Nut, Acorn Nut, Hex Head Cap Screws, Socket Set Screws, Anchor Screws, Socket Head Screws, Concrete Screws, Shoulder Screws, Threaded Screws, Machine Screws, Machine Washers, Flat Washer, Star Washers, Sealing Washer, Lock Washer etc.

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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.

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Copper Nickel 70/30 fasteners are indispensable across shipbuilding, offshore drilling systems, desalination plants, naval fleets, coastal power stations, seawater cooling lines, chemical processing circuits, and submerged engineering equipment. They fasten pipes, valves, pumps, condensers, marine engines, hull systems, and underwater structures exposed to relentless chloride and biological activity. Ideal for high-moisture installations, heat-transfer assemblies, ballast systems, and port infrastructure, these fasteners ensure superior corrosion resistance and secure mechanical performance. Wherever seawater exposure, long operational life, and metallurgical compatibility are critical, Cu-Ni 70/30 fasteners deliver enduring fastening strength and ocean-grade reliability.

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Types of Copper Nickel 70/30 Fasteners

At Hazlewood Fasteners are packaged in a way that retains the quality of Copper Nickel 70/30. The fasteners are also protected and packed separately in strong and moisture proof packs to avoid rusting and contamination. Proper labeling makes it easier to identify the product and also makes handling easier. Our accurate packaging ensures that the fasteners reach the customers in the right condition and are usable immediately, which is a testimony of our quality products and excellent customer relations.