Copper Nickel 90/10 Buttweld Fittings are used in seawater piping systems, shipbuilding, desalination plants, condenser units, and offshore marine pipelines where saltwater corrosion is a constant issue.
ARK Stainless Inc is a manufacturer, supplier, and exporter of Copper Nickel 90/10 Buttweld Fittings in Mumbai, India, supplying ASTM B466 / ASTM B467 and ASME B16.9 standard fittings for industrial and marine piping applications.
The range includes Copper Nickel elbows, tees, reducers, caps, stub ends, bends, and fabricated fittings supplied in seamless, welded, and ERW construction as per project requirements.
These Cu-Ni 90/10 pipe fittings are used in seawater cooling lines, heat exchangers, condenser systems, marine engineering, offshore platforms, and desalination pipelines where resistance to brine water and chloride exposure is required.
Copper Nickel fittings are selected for seawater resistance, anti-fouling properties, stress corrosion cracking resistance, and stable performance in continuous wet and chloride-rich environments. They also perform in alkaline salt conditions and diluted non-oxidizing acids.
Manufacturing is done using tested raw materials under controlled processes with dimensional checks and in-process inspections. Each batch is supplied with material test certificates, mechanical testing reports, and chemical analysis reports as per requirement.
Packaging is done in export-grade wooden boxes or cartons with proper marking for grade, size, and heat number to ensure traceability during shipment.
| 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 |
| Grade | Tensile Strength (Ultimate) | Tensile Strength (Yield) | Elongation at Break | Charpy Impact | Machinability (%) | Shear Modulus | Poisson's Ratio | Elastic Modulus |
|---|---|---|---|---|---|---|---|---|
| Cu-Ni 70/30 | 372–517 MPa / 54000–75000 psi | 88.0–483 MPa / 12800–70100 psi | 45.0% (in 381 mm) | 107 J / 78.9 ft-lb | 20% | 57.0 GPa / 8270 ksi | 0.34 | 150 GPa / 21800 ksi |
| Cu-Ni 90/10 | 303–414 MPa / 43900–60000 psi | 110–393 MPa / 16000–57000 psi | 42.0% (in 254 mm) | — | 20% | 52.0 GPa / 7540 ksi | 0.34 | 140 GPa / 20300 ksi |
ARK Stainless Inc is a manufacturer, supplier, and exporter of Copper Nickel 70/30 Buttweld Fittings in India supplying Cu-Ni 70/30 pipe fittings for seawater piping systems, marine applications, offshore platforms, desalination plants, and condenser pipelines.
The range includes Copper Nickel 70/30 elbows, tees, reducers, caps, stub ends, crosses, and couplings in seamless, welded, and fabricated construction with Sch 10 to Sch 160 wall thickness.
These Cupro Nickel 70/30 Pipe Fittings are manufactured as per ASTM B466, ASTM B467, ASME B16.9, and MSS SP-43 standards for industrial piping systems operating in saltwater and corrosive environments.
Cu-Ni 70/30 fittings are widely used in shipbuilding, heat exchangers, cooling water systems, offshore marine piping, hydraulic lines, and chemical processing plants due to resistance against seawater corrosion, pitting, erosion, and stress corrosion cracking.
Copper Nickel 70/30 alloy contains higher nickel content which improves corrosion resistance in chloride and brine water applications. The material also offers good weldability, formability, thermal conductivity, and stable mechanical strength at elevated temperatures.
Custom size Copper Nickel Pipe Fittings are available in polished, pickled, and machined finish with PMI testing, ultrasonic testing, chemical analysis, and material test certificates as per project requirements.
All Copper Nickel Buttweld Fittings are packed in export-grade wooden boxes or cartons with proper marking for grade, size, and heat number for safe transportation and traceability.
| STANDARD | UNS | WNR. |
|---|---|---|
| Copper Nickel 70/30 | C71500 | 2.0882 |
Copper Nickel 90/10 Buttweld Fittings (C70600) are widely used in seawater piping systems, shipbuilding, desalination plants, offshore platforms, and marine cooling water lines where continuous exposure to saltwater and chloride environments leads to corrosion issues in conventional piping materials.
ARK Stainless Inc is a manufacturer, supplier, and exporter of Copper Nickel 90/10 Buttweld Fittings in India, offering Cu-Ni pipe fittings in multiple sizes, schedules, and configurations as per industrial and project-specific requirements. The fittings are available in elbows, tees, reducers, caps, stub ends, bends, and cross fittings in seamless, welded, ERW, and fabricated forms manufactured as per ASTM B466 / ASME SB466 and dimensional standards including ASME B16.9.
Copper Nickel 90/10 fittings are primarily selected for seawater service applications due to their ability to resist corrosion in brine water, chloride exposure, and marine fouling conditions. These fittings are commonly installed in ship cooling systems, condenser piping, offshore oil and gas systems, desalination units, and heat exchanger networks where long service life and stable performance are required.
The chemical composition of Copper Nickel 90/10 consists of 90% copper and 10% nickel along with small additions of iron and manganese, which enhance corrosion resistance and mechanical stability. The material offers good resistance to stress corrosion cracking, excellent thermal conductivity, and reliable performance in continuously wet and aggressive marine environments. It also provides good weldability and formability, making it suitable for fabrication and installation in complex piping layouts.
All Copper Nickel 90/10 Buttweld Fittings are supplied with material test certificates, chemical and mechanical test reports, and PMI testing as per requirement. Third-party inspection can also be arranged based on project specifications. Each fitting is checked for dimensional accuracy and surface condition before dispatch to ensure consistency in quality.
Packaging is done in export-grade wooden boxes or cartons depending on shipment requirements, with proper marking for grade, size, and heat number to maintain traceability during installation and inspection at site.
| STANDARD | UNS | WNR. |
|---|---|---|
| Copper Nickel 90/10 | C70600 | 2.0872 |
