CUPRO NICKEL 70/30 FASTENERS consist of copper and nickel as their base elements. Iron, magnesium, zinc, silicon, carbon, titanium, and chromium are also present in its alloy. As the basic materials are copper and nickel, the fasteners made from this alloy have excellent corrosion resistance. These are primarily used in marine and offshore environments where the chances of corrosion are high. As the salt and alkaline medium present in these environments could lead to oxidation. CUPRO NICKEL 70/30 FASTENERS have very great strength and can be easily fabricated. Various tests such as modulus of elasticity, checking the tensile strength, matching the density, etc., are carried out to check their durability. As they are also resistant to thermal environments, they can withstand high temperatures and are good conductors of heat. The amount of magnesium present in 70/30 CuNi Fasteners also provides excellent electrical properties. However, they are poor conductors of electricity as compared to the other alloys. Due to the amount of nickel present, it has more excellent mechanical properties, which also works the best at high temperatures.


These fasteners can be produced in different shapes, sizes, and diameters based on the user specifications. They also can withstand additional alkaline and chemical environments. Also, the several testing performed on them makes them of the best quality compared to the other fasteners.

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ISO 9001 : 2015


Specifications ASTM B151 / ASME SB151
Standard DIN, ISO ,JIS ,GB, IS, BS, ASTM
Size M0.2 to M33 | 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
Threads Configuration 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 Nickel Alloy 200 Fasteners
Phosphate Coating
Teflon Coating
Xylon Coating
Zinc Coating

Equivalent Grades

Cupro Nickel 70/30 C71500 2.0882

Chemical Composition

Grade Cu Pb Mn Fe Zn Ni
Cu-Ni 70/30 88.6 min 0.05 max 1.0 max 1.8 max 1 max 9-11 max

Mechanical Properties

Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
8.1 g/cm3 1443 °C (2430 °F) Psi – 35,000, MPa – 241 Psi -80,000, MPa -551 30 %

Applications & Operations

We at DC Engineering make sure that our every product is made of high quality raw material. We thoroughly test each and every product before dispatching it to our customers. DC Engineering is one of the most trusted manufacturers and suppliers of fasteners and bolts which are applicable in various industries.

  • Gas Processing Industries
  • Petrochemical Industries
  • Power Generation Industries
  • Food Processing Industries
  • Chemical Industries
  • Oil & Gas Industries
  • Fertilizers Industries
  • Sugar Industries

Experimentation & Testing

DC Engineering is known for its accurate and perfect dimensions. We at DC engineering thoroughly test all our products before shipping them to the customers. We carry out destructive as well as non-destructive tests on all our products.

  • Impact Analysis
  • Eddy Current Examining
  • Power Generation Industries
  • Hydrostatic Analysis
  • Prompt Test
  • Positive Material Recognition
  • Large-Scale Test
  • Pitting Protection Test

Packaging & Dispatching

DC Engineering uses the most safest and the most effective ways of packaging for all types of deliveries. We pack our goods in various ways such as:

  • Wooden Boxes
  • Wooden Crates
  • Wooden Pallets
  • Carton Boxes
  • Shrink-Wrapped
  • Bubble Wrap Packing Material
  • Laminated & Metallized Films
  • Wooden or Plastic Crates

Cities We Export

Srinagar, Tamil Nadu, West Bengal, Vijayawada, Maharashtra, Rajkot, Karnataka, Akola, Amravati, Kanpur, Aurangabad, Andhra Pradesh, Saharanpur, Vasai, Varanasi, Faridabad, Bhadreswar, Jhansi, Nashik, Solapur, Surat, Nagpur, Raipur, Haryana, Buxar, Bhavnagar, Pune, Punjab, Banswara, Uttar Pradesh, Tadepalligudem, Manipur,Delhi, Dhanbad, Guntur, Gujarat, Ludhiana, Kalyani, Nagapattinam, Benin, Vadodara, Kerala, Patna, Ulhasnagar, Chhattisgarh, Mizoram, Chennai, Kurnool, Datia, Mangalore, Ambala, Kota, Miryalaguda, Orissa, Mumbai, Nagda, Bikaner, Ballia, Allahabad, Suryapet, Jaipur, Haora, Durgapur, Udgir, Jodhpur, Amritsar, Kalyan, Bangalore, Puducherry, Agra, Kolkata, Tirunelveli, Gujarat, India, Lucknow, Meerut, Dehradun, Bihar, Ujjain, Jharkhand, Ahmedabad, Coimbatore, Sadar, Jamnagar, Hyderabad, Chandigarh, Ranchi, Jamalpur, Ambattur, Jabalpur, Waghala, Nagaur, Gulbarga

Countries We Export

Iran, Ecuador, Mexico, Afghanistan, Bulgaria, Denmark, Kenya, Singapore, Portugal, Venezuela, Sri Lanka, Chile, Gabon, Colombia, Belgium, Peru, Belarus, Yemen, Thailand,France, Italy, Mexico, Greece, Kuwait, Romania, Iraq, Netherlands, Sweden, Switzerland, Lithuania, Lebanon, Poland, Philippines, United Kingdom, Norway, Angola, Kazakhstan, Taiwan, Nigeria, Poland, China, Nigeria, Spain, Mongolia, New Zealand, United States, Hungary, Libya, Serbia, Ukraine, Finland, South Africa, Iran, Vietnam, Israel, Czech Republic, Slovakia, Hong Kong, Azerbaijan, Qatar, Japan, Oman, Malaysia, Pakistan, Algeria, Bangladesh, Jordan, Indonesia, Russia, United Arab Emirates, Brazil, Estonia, Turkey, Austria, Croatia, Ghana, Bahrain, Korea, Canada, Bolivia, Costa Rica, Trinidad & Tobago, Tunisia, Chile, Morocco, Bhutan, Argentina, Egypt

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