Cupro-Nickel 70/30 Fasteners are hardware components made from an alloy known as Copper-Nickel 70/30, also known as C71500. This alloy is a combination of 70% copper and 30% nickel, with trace amounts of iron and manganese. The chemical composition of Cupro-Nickel 70/30 provides a unique set of properties that make it suitable for various engineering applications.

One of the key features of Cupro-Nickel 70/30 Fasteners is its excellent resistance to seawater corrosion and biofouling. This alloy is widely used in marine environments, particularly in applications where corrosion resistance is crucial. Cupro-Nickel 70/30 Fasteners exhibit superior resistance to marine organisms, chloride-induced corrosion, and erosion, making them ideal for applications in shipbuilding, offshore platforms, and seawater-cooled systems.

Cu-Ni Alloy 70/30 Fasteners, Copper Nickel 70/30 Bolts, 2.0882 Bolt, ASTM B151 Cupro Nickel Alloy 70/30 Fasteners, ASTM B151 Cupro Nickel 70/30 Washer, Cupro Nickel 70/30 Washers, Cupro Nickel 70/30 Fasteners Manufacturers in India.

Cupro Nickel 70/30 Fasteners
  • UNS


  • WNR



    ASTM B151, ASME SB151


Another significant feature of Cupro-Nickel 70/30 Fasteners is their exceptional strength and ductility. This alloy possesses a good balance of mechanical properties, making it easy to work with during fabrication processes such as forming, machining, and welding. Its high strength allows Cupro-Nickel 70/30 Fasteners to withstand mechanical stresses and loads encountered in various marine and industrial applications.

Corrosion resistance is one of the most important qualities of Cupro-Nickel 70/30 Fasteners. The alloy develops a protective oxide layer in seawater, enhancing its resistance to corrosion and minimizing the risk of galvanic corrosion when coupled with other metals. This makes it an excellent choice for fastening critical components in marine environments, such as propellers, heat exchangers, and condensers.

DIN 2.0882 Tab Washer, Cupro Nickel 70/30 T Nuts, CuNi UNS C71500 Carriage Bolts, ASME SB151 Cupro Nickel 70/30 Hex Nuts, UNS C71500 Plain Washer, Cupro Nickel 70/30 Nuts, Cupro Nickel 70/30 Studs, 70/30 Cupro Nickel Rivet Nuts, Cupro Nickel 70/30 Fasteners Manufacturers in India.

fevicon-logo Cupro Nickel 70/30 Bolts and Nuts Specification

Specifications ASTM B151, ASME SB151
Standard DIN, ASTM, BS and all International Standards
Size M3 to M90
Length 10mm to 1000mm
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 Hex, Threading, Square, Round as per Gauge Etc.
Head Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
Neck type Hex, Square, Triangular, Oval & Knurled etc.
Surface Coating Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request
Manufacturing Process Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing.

Cupro-Nickel 70/30 Fasteners are widely used in marine construction and naval applications due to their outstanding resistance to seawater corrosion and biofouling. They are employed in fastening components exposed to harsh marine environments, including ship hulls, heat exchangers, and underwater equipment. Additionally, they are used in offshore oil and gas platforms, desalination plants, and seawater-cooled power generation facilities. Their combination of corrosion resistance, strength, and ductility makes them well-suited for critical fastening purposes in marine and industrial settings.

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fevicon-logo Equivalent Grades Of Cupro Nickel 70/30 Fasteners

Copper Nickel 70/30 2.0882 C71500

fevicon-logo Chemical Composition of Cupro Nickel 70/30 Fasteners

Grade Cu Mn Pb Ni Fe Zn
Cu-Ni 70-30 65.0 min 1 max .05 max 29-33 0.4-1.0 1 max

fevicon-logo Mechanical Properties of Cupro Nickel 70/30 Fasteners

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Copper Nickel 70-30 0.323 lb/in3 at 68 F 2260 F 50000 psi 20000 psi 30 %

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fevicon-logo Types of Cupro Nickel 70/30 Fasteners


Cupro Nickel 70/30 Nuts


CuNi 70-30 Bolt


Cupro Nickel 70/30 Washer

Stud Bolts

70-30 Cu-Ni Stud Bolts

Hex Bolt

Cupro Nickel Alloy 70/30 Hex Bolt

Threaded Rod

Cupro Nickel 70/30 Threaded Rod

Anchor Bolt

70/30 Copper Nickel Anchor Bolt

Spring Washer

Cupro Nickel 70/30 Spring Washer

Fasteners Manufacturers In India

  • Hardness testing to ISO 6508-1

  • Nut proof load testing to ISO 898-2

  • Suitability for preloading to EN 14399-2

  • Calibrated gauges and tools

fevicon-logo Other Types Of Cupro Nickel 70/30 Fastener

Copper Nickel 70/30 Bolts Cupro Nickel 70/30 Hex Bolt
Copper Nickel 70/30 Hex Bolt 70/30 Copper Nickel Fasteners
UNS C71500 Copper Nickel 70/30 Stud Bolts Din 2.0882 Copper Nickel Threaded Rod
Copper Nickel 70/30 Spring Washer Cu Ni 70/30 Fasteners
Copper Nickel 70/30 Fasteners Cupro Nickel (Cu-Ni) 70/30 Fasteners
Cu-Ni UNS C71500 70/30 Spring Washers ASTM B151 70/30 Cupro Nickel Hex Bolt

fevicon-logo Cupro Nickel 70/30 Fastener Application Industries

Aerospace Industry
Nuclear Industry
MEdical Industry
Marine Industry
Mining Industry
Automotive Industry
Construction Industry
Manufacturing Industry
Nut Bolt