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Copper Nickel Fasteners

Cu-Ni Fasteners

One of the most extensively used alloys in the industry for producing high-quality fasteners is copper-nickel alloy. When it comes to creating fasteners, the alloy is selected because to its grade properties and other general characteristics. Additionally, because to the enormous market need, companies are now producing more Cu-Ni Fasteners. There are only two fundamental types of copper-nickel alloy: 90/10 and 70/30. Outstanding resistance to corrosion, resistance to aqueous conditions, and resistance to pitting in an acidic environment are the fundamental general features shared by both grades. The grade also possesses great toughness, high strength, good resistance to biofouling environments, excellent ductility, and resistance to low temperature coefficient.
When compared to alloys without the nickel element, the copper-nickel alloy’s nickel content aids in improving/maintaining the strength under high temperatures and pressure. Cu-Ni Fasteners are widely employed in the piping and sea water machine industries because of the alloy’s excellent resistance to the environment of sea water corrosion. These fasteners can be utilized in suspension systems and other high temperature environments because the alloy does not require any sort of surface protection.

Cu-Ni Fasteners Specifications

Specifications : ASTM B151 / ASME SB 151
Standard : DIN, ASTM, BS and all International Standards
Length : 3 mm to 200 mm
Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size : M1.6 – M12
Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Type : Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Hex Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, T-Head Bolts, Wing Screw, Eye Bolt, Foundation Bolts, Structural Bolts.

Cu-Ni Fasteners Equivalent Grades

STANDARD UNS WERKSTOFF NR. AFNOR EN JIS BS GOST
Cu-Ni 90/10
C70600
2.0872
Cu-Ni 70/30
C71500
2.0882

Cu-Ni Fasteners Chemical Composition

Grade Cu Pb Mn Fe Zn Ni
Cu-Ni 90/10
88.6 min
.05 max
1.0 max
1.8 max
1 max
9-11 max
Cu-Ni 70/30
65.0 min
.05 max
1.0 max
0.4-1.0
1 max
29-33

Mechanical Properties of Cu-Ni Fasteners

Grade Density Melting Point Tensile Strength Yield Strength Elongation
Cu-Ni 90-10/70-30
0.323 lb/in3 at 68 F
2260 F
50000 psi
20000 psi
30 %

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