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In the CUPRO NICKEL NUTS, the base elements are copper and nickel. Both of them have excellent properties and hence the fasteners that are manufactured by these elements also possess excellent properties. The Copper-Nickel 70 / 30 Nuts have manganese and iron in their chemical composition; therefore, they are widely used in sea water-related applications where corrosion occurs. However, Copper Nickel 90 / 10 Nuts have excellent high strength corrosion resistance. Along with this, they also have the property of being ductile and are also tough.

The Copper-Nickel 70 / 30 Nuts are made of a chemical composition that has 70 percent copper and 30 percent nickel. It also has a specific concentration of manganese along with iron. The combination of these elements improves the fastener's ability to resist corrosion. Their strength is comparatively better than the Copper-Nickel 90 / 10 Nuts, which makes them suitable for various applications.

The Copper-Nickel 90 / 10 Nuts is also considered as a cost-friendly alternative for Copper-Nickel 70 / 30 Nuts. The Copper-Nickel 90 / 10 Nuts also show good strength at slightly elevated temperatures. They can be fabricated by both hot working procedures as well as cold working procedures. They also possess the characteristics of being easily weldable. The Copper-Nickel 90 / 10 Nuts is considered slightly superior compared to the Copper-Nickel 70 / 30 Nuts.

Some of the properties of Copper Nickel alloy are that they are ductile. They have good resistance to corrosion and also have good strength. Because of all these properties and characteristics that they have, they are used in a wide range of industrial applications.

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Specification :-

Specification ASTM B 151 ASME SB 151
Standard DIN, ASTM, BS and all International Standards
Size M3 - M56 | 3/6" to 2" | Custom Sizes
Length 3 mm to 200 mm | Custom Sizes
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Form Hex, Threading, Square, Round as per Gauge Etc.
Threads Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or
Threads available UNF, BSW, BSF, METRIC, UNC, or as required
ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Certification Dual Certified As per ASTM & ASME Codes
Test Certificate As per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Raw materials Source JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc.
Packing IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request
Surface Coating Cadmium Coating
Hot Dipped Galvanizing Coating
Ptfe Coated
Phosphate Coating
Teflon Coating
Xylon Coating
Zinc Coating

Equivalent Grades

Cupro Nickel 90/10 2.0872 C70600
Cupro Nickel 70/30 2.0882 C71500

Chemical Composition

Grade Cu Mn Pb Ni Fe Zn
Cupro Nickel 90/10 88.6 min 1.0 max 0.05 max 9-11 max 1.8 max 1 max
Cupro Nickel 70/30 65 min 1.0 max 0.05 max 29-33 max 0.4-1.0 max 1 max

Mechanical Properties

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Cupro Nickel 90/10 0.323 lb/in3 at 68 F 2260 F 50000 psi 20000 psi 30 %
Cupro Nickel 70/30 0.323 lb/in3 at 68 F 2260 F 50000 psi 20000 psi 30 %

Applications and Uses

  • Chemical Industries
  • Oil & Gas Industrires
  • Power Plant Industries
  • Shipbuilding Industries
  • Fertilizer Industrires
  • Petrochemical Industrires
  • Sugar Industrires
  • Cement Industrires