Sumit Impex is a leading manufacturer, supplier, and exporter of Cupro-Nickel 70-30 and 90-10 Fasteners, prized for their exceptional resistance to corrosion and high-temperature durability. These fasteners are extensively utilized in critical applications such as marine engineering, shipbuilding, and offshore oil and gas production. Trust us to deliver superior-quality fastening solutions tailored to your precise industrial requirements, ensuring optimum performance and longevity.

Sumit Impex is a Supplier of Cupro-Nickel 70-30 / 90-10 Fasteners, Biggest Stockist of Cupro-Nickel 70-30 / 90-10 Fasteners as per Standards in Mumbai, India.

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Cupro-Nickel 70-30 Fasteners are high-quality bolts, screws, or nails made from a copper-nickel alloy containing 70% or 90% copper, respectively. These fasteners are known for their exceptional corrosion resistance, especially in marine environments, making them ideal for shipbuilding, offshore structures, and other marine applications. With their excellent mechanical properties and durability, Cupro-Nickel 90-10 Fasteners offer reliable performance in challenging conditions.

At Sumit Impex, we ensure the quality of our Cupro-Nickel 70-30 and 90-10 Fasteners through testing. From hardness checks to corrosion resistance tests, we ensure our fasteners meet high standards. We provide clear documentation, including packaging details and Certificates of Origin, to ensure transparency. Additionally, we offer third-party inspection certificates to guarantee the reliability of our fasteners across different uses.

Copper Nickel 70/30 Fasteners

Standard Specification For Cupro-Nickel 70-30 /90 -10 Fasteners

Specifications DIN, ASTM, BS
Fasteners size Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size : M1.6 – M12
Self Tapping Screw Size : No.2 – No. 14
Fasteners Length 3 mm to 200 mm
Fastener Threads UNF, BSW, BSF, METRIC, UNC or as required
Standard of Stainless Steel Fasteners DIN : DIN 934, DIN 931, DIN 970, DIN 933
ISO : JIS standards, ISO 4033, ISO 4032,
ANSI – American National Standards Institute
ASME B18.5
ANSI B 28.2.4 1M
as per defined in ASME B16.5 standard SS Stud Bolt length
ANSI B 18.2.4 2M
as per defined in ASME B18.2.2 SS Hex nuts
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Surface Coating Ptfe Coated Stainless Steel Fasteners
Phosphate Coating
Teflon Coating
Zinc Coating
Hot Dipped Galvanizing Coating
Cadmium Coating
Xylon Coating
Fasteners Finishing Stainless steel : Self-Colour, Passivated, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Stainless Steel, Sherardized, some special one like DACROMET Geometry and Mechanically Applied coating ,Dacroment, nickel plated, anodizing, plated zinc-nickel
Zinc (blue, black, yellow, white), black oxide.

Cupro-Nickel 70-30 / 90-10 Fasteners Types

Stud Bolts

Stud Bolts







Cupro-Nickel 70-30 / 90-10 Fasteners Equivalent Grades

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

Cupro-Nickel 70-30 / 90-10 Fasteners Chemical Composition

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
Cu-Ni 90-10 88.6 min 1.0 max .05 max 9-11 max 1.8 max 1 max

Cupro-Nickel 70-30 / 90-10 Fasteners Mechanical Properties

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 %
Copper Nickel 90-10 0.323 lb/in3 at 68 F 2260 F 50000 psi 20000 psi 30 %

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Cupro-Nickel 70-30 / 90-10 Fasteners Applications

Export & Supply Destinations Of Cupro-Nickel 70-30 / 90-10 Fasteners

Japan, Malaysia, British, Bhutan, Philippines, Russia, Egypt, Bahrain, Qatar, Maldives, Hong Kong, Taiwan, Afghanistan, Oman, Israel, Vietnam, Singapore, Saudi Arabia, Bangladesh, Turkey, Kuwait, India, Sri Lanka, Jordan, Kyrgyzstan, Armenia, South Korea, Iraq, Myanmar, North Korea, Azerbaijan, Indonesia, Macau, Iran, United Arab Emirates, China, Mongolia, Lebanon, Thailand, Nepal.

United Kingdom, Cyprus, Azerbaijan, Romania, Liechtenstein, Serbia, Portugal, Germany, Lithuania, Hungary, Ireland, Russia, France, Finland, Bulgaria, Italy, Estonia, Belarus, Norway, Spain, Czechia/Czech Republic, Luxembourg, Switzerland, Moldova, Austria, Denmark, Netherlands, Greece, Malta, Ukraine, Monaco, Belgium, Turkey, Latvia, Croatia, Sweden, Poland, Slovakia.

Kenya, Central African Republic, Morocco, Tanzania, Niger, Tunisia, Cameroon, Burundi, Senegal, Namibia, Nigeria, Burkina Faso, South Africa, Zimbabwe, Ethiopia, Uganda, Gambia, Liberia, Mozambique, Algeria, Seychelles, Botswana, Mauritania, Eswatini, Egypt, Zambia, Rwanda, Madagascar, Angola, Mauritius, Libya.

Bahamas, El Salvador, Trinidad and Tobago, United States of America, Antigua and Barbuda, Honduras, Costa Rica, Jamaica, Saint Vincent and the Grenadines, Nicaragua, Haiti, Grenada, Cuba, Belize, Dominica, Guatemala, Panama, Mexico, Dominican Republic, Barbados, Saint Lucia, Canada.

Paraguay, Guyana, Venezuela, Brazil, Peru, Chile, Suriname, Ecuador, Bolivia, Colombia, Uruguay, Argentina.