ARK Stainless Inc. is a reliable manufacturer and supplier of high-performance Copper Nickel Buttweld Fittings, designed to deliver exceptional durability and superior resistance to seawater corrosion. These fittings are ideal for demanding applications in marine and offshore environments, including shipbuilding, desalination plants, and cooling systems. Their natural resistance to biofouling and stress corrosion cracking makes them highly effective in such aggressive conditions.
Our Copper Nickel Buttweld Fittings are manufactured using premium alloys such as 70/30 (C71500) and 90/10 (C70600), ensuring high resistance to corrosion and excellent mechanical properties. These fittings are available in multiple types including Seamless, Welded, Fabricated, and ERW, and are produced in accordance with international standards such as ASTM B466 / ASME SB466 and dimensional standards like ASME B16.9, B16.28, and MSS-SP-43.
Copper Nickel Buttweld Fittings from ARK Stainless Inc. are perfect for high-pressure, high-temperature applications, offering an excellent balance of strength, thermal conductivity, and resistance to corrosion—especially in seawater and other harsh environments. Each fitting undergoes rigorous testing to ensure consistent performance and long-lasting reliability in critical systems.
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
|---|---|---|---|---|---|---|
| Cupro Nickel 70/30 | 65 min | 1.0 max | 0.05 max | 29-33 max | 0.4-1.0 max | 1 max |
| Cupro Nickel 90/10 | 88.6 | 1.0 max | 0.05 max | 9 - 11 max | 1.8 max | 1 max |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|---|
| Cupro Nickel 70/30 | 0.323 lb/in³ at 68°F | 2260°F | 50000 psi | 20000 psi | 30% |
| Cupro Nickel 90/10 | 0.323 lb/in³ at 68°F | 2260°F | 50000 psi | 20000 psi | 30% |
Copper Nickel 70/30 Buttweld Fittings are widely used across many industries, including offshore oil drilling, pharmaceuticals, chemical processing, gas processing, rail components, water industries, mining, transport, and agriculture.
Copper Nickel 70/30 Buttweld Fittings are designed with advanced fabrication methods, making them highly weldable to meet specific requirements. These fittings are manufactured with high-quality raw materials to ensure reliable performance in harsh chemical and hostile environments, without deformation. The addition of iron and manganese offers exceptional strength, providing resistance to general corrosion. They are particularly suited for use in chemical and food processing industries.
These fittings are highly favored in marine applications due to their excellent anti-fouling and corrosion-resistant properties. The fittings prevent marine life from infiltrating the pipes, ensuring that the oil and gases within remain uncontaminated. Their ability to withstand high temperatures makes them ideal for use in drilling equipment, enabling the extraction of materials from deep underground.
It is crucial that these fittings meet all the required standards and undergo rigorous testing. Our company ensures that all necessary documentation is provided to guarantee their quality and compliance with industry regulations.
| STANDARD | UNS | WNR. | EN | AFNOR |
|---|---|---|---|---|
| Cupro Nickel 70/30 | C71500 | 2.0882 | NiCr20CuMo | Z2NCUD31-20AZ |
Copper Nickel 90/10 Forged Fittings are available in various end types such as plain end, beveled end, and threaded end—selected based on the application and service conditions. These fittings are widely used in structural and architectural applications including scaffolding, construction frameworks, furniture manufacturing for homes and offices, and infrastructure projects.
Moreover, Copper Nickel 90/10 Forged Fittings are commonly employed in the fabrication of body parts for railcars, ships, boats, trucks, and transmission towers due to their excellent mechanical properties and resistance to corrosive environments.
To ensure superior quality and compliance, these fittings undergo rigorous testing such as leco analysis, flexibility tests, durability evaluation, and nickel verification. Along with testing, they are delivered with necessary certifications like 100% raw material certificate, PMI test reports, and 100% radiography reports to ensure trust and reliability in demanding industrial applications.
| STANDARD | UNS | WNR. | EN | AFNOR |
|---|---|---|---|---|
| Cupro Nickel 90/10 | C70600 | 2.0872 | NiCr20CuMo | Z2NCUD31-20AZ |
