Copper Nickel 70-30 is a type of alloy that is composed of 70% copper and 30% nickel, along with trace amounts of other elements like iron and manganese. This alloy is renowned for its excellent corrosion resistance, especially in marine environments where it is exposed to seawater and other corrosive elements. The addition of nickel to copper imparts enhanced strength, durability, and resistance to oxidation, making Copper Nickel 70-30 a popular choice for various industrial applications.
Buttweld fittings, on the other hand, are components used in piping systems to connect pipes of different sizes or change the direction of flow. These fittings are welded to the pipes using a butt welding process, which involves heating the ends of the pipes and the fitting until they melt and fuse together. This creates a strong, leak-proof joint that ensures efficient and reliable fluid transmission in various industries such as oil and gas, chemical processing, shipbuilding, and more.
Copper Nickel 70-30 buttweld fittings are specifically designed using the Copper Nickel 70-30 alloy. These fittings offer a combination of the alloy's corrosion resistance and mechanical properties, making them suitable for applications that require both durability and anti-corrosive properties. They are commonly used in marine environments, offshore platforms, and desalination plants where exposure to saltwater and brine solutions is a concern.
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Specification:
| Specification | Details |
| Alloy Composition | 70% Copper, 30% Nickel, traces of Iron and Manganese |
| Corrosion Resistance | Excellent resistance to seawater, brine, and corrosive environments |
| Mechanical Properties | - Tensile Strength: 450 - 550 MPa <br> - Yield Strength: 150 - 220 MPa <br> - Elongation: 30 - 35% |
| Thermal Stability | Can withstand high temperatures and thermal cycling |
| Joining Method | Butt welding for secure, leak-proof joints |
| Applications | - Marine environments <br> - Offshore platforms <br> - Desalination plants <br> - Chemical processing <br> - Shipbuilding <br> - Oil and gas industry |
| Advantages | - Corrosion resistance <br> - Mechanical strength <br> - Low maintenance <br> - Compatibility with other materials |
| Common Types | Elbows, Tees, Reducers, Caps, Flanges, Couplings, Crosses, etc. |
| Standards | Conforms to ASTM B122, ASTM B171, ASTM B466, ASTM B467, ASME B16.9, ASME B16.11, MSS SP-79, MSS SP-83, etc. |
Chemical composition of COPPER NICKEL 70-30 BUTTWELD FITTINGS
| Element | Composition |
| Copper | 70 |
| Nickel | 30 |
| Iron | < 0.6 |
| Manganese | < 0.6 |
| Others* | < 0.5 each, < 1.0 total |
Mechanical Properties of COPPER NICKEL 70-30 BUTTWELD FITTINGS
| Property | Value Range |
| Tensile Strength | 450 - 550 MPa |
| Yield Strength | 150 - 220 MPa |
| Elongation | 30 - 35 |
| Hardness | 110 - 160 HV |
| Modulus of Elasticity | 1.27 x 10^5 MPa |
Advantages of COPPER NICKEL 70-30 BUTTWELD FITTINGS
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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