Copper Nickel 70/30 Flanges are high-performance copper-nickel alloy flanges containing approximately 70% copper and 30% nickel, offering exceptional resistance to seawater corrosion, biofouling, and erosion. As trusted manufacturers, Gopal Forge Industries™ produces premium-quality Copper Nickel 70/30 Flanges that are widely used in marine engineering, shipbuilding, offshore platforms, and desalination plants where durability and corrosion resistance are essential.
As established manufacturers, Gopal Forge Industries™ follows strict quality control procedures and advanced forging methods to manufacture flanges that meet international standards. Copper Nickel 70/30 alloy exhibits superior strength and improved resistance to impingement attack compared to other copper alloys, making these flanges an excellent choice for demanding seawater applications.
Being experienced exporters, we supply Copper Nickel 70/30 Flanges to customers worldwide with complete documentation and material traceability. Every flange undergoes thorough inspection and testing before shipment to ensure consistent performance and dimensional accuracy. Our export capabilities enable industries across the globe to source dependable piping components from a trusted manufacturing partner.
As professional suppliers, Gopal Forge Industries™ offers a complete range of Copper Nickel 70/30 Flanges, including weld neck flanges, blind flanges, slip-on flanges, threaded flanges, socket weld flanges, and lap joint flanges. These flanges are extensively used in industrial piping solutions where excellent resistance to seawater corrosion and erosion is required.
As dedicated stockists, we maintain a comprehensive inventory of Copper Nickel 70/30 Flanges in various sizes, pressure classes, and specifications. Our ready stock helps customers meet urgent project requirements and maintenance schedules without long procurement delays. This inventory support ensures smooth operations across marine and offshore industries.
As dependable suppliers, we provide more than just flanges. Our product portfolio includes pipe fittings, buttweld fittings, carbon steel elbow products, stainless steel elbow fittings, reducers, tees, stub ends, and other piping accessories. These products are engineered to deliver reliable performance in corrosive and high-pressure environments.
| Product Name | Copper Nickel 70/30 Flanges |
|---|---|
| Technical Description | Copper Nickel 70/30 Flanges are manufactured from CuNi 70/30 alloy (UNS C71500) and provide excellent resistance to seawater corrosion, erosion, impingement attack, and biofouling. They are suitable for demanding marine, offshore, desalination, and seawater piping applications. |
| Available Sizes | ½" NB to 48" NB; custom sizes available on request |
| Material Grades | Copper Nickel 70/30, UNS C71500, CuNi 70/30 |
| Equivalent Grades | DIN 2.0882, CW354H, BS 2871 CN107 |
| Standards | ASME B16.5, ASME B16.47, EN 1092-1, DIN, BS 4504, MSS SP-44 |
| Flange Types | Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Threaded (TH), Lap Joint (LJ), Ring Type Joint (RTJ), Spectacle Blind |
| Pressure Ratings | Class 150, 300, 400, 600, 900, 1500, 2500 |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Dimensions | Manufactured according to the applicable flange standard, nominal size, pressure class, and facing type. |
| Manufacturing Process | Forged, hot worked, and CNC machined |
| Surface Finish | Natural, pickled, machined, polished, and sand blasted |
| Testing | PMI Testing, Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Ultrasonic Testing (UT), Visual Inspection, and Dimensional Inspection |
| Certification | EN 10204 3.1 / 3.2, Mill Test Certificate (MTC); NACE Compliance available on request |
| Corrosion Resistance | Excellent resistance to seawater corrosion, erosion, impingement attack, and biofouling |
| Applications | Marine Engineering, Shipbuilding, Offshore Oil & Gas, Desalination Plants, Condensers, Heat Exchangers, Fire-Water Systems, Marine Cooling Systems, and Seawater Piping Systems |
| Manufacturer | Gopal Forge Industries™ |
| Grade | Cu | Ni | Fe | Mn | Pb | Zn | C | S |
|---|---|---|---|---|---|---|---|---|
| Copper Nickel 70/30 (UNS C71500) | Balance (Approx. 69.0 - 71.0) | 29.0 - 33.0 | 0.40 - 1.00 | 1.00 Max | 0.05 Max | 1.00 Max | 0.05 Max | 0.02 Max |
| Grade | Tensile Strength | Yield Strength (0.2% Offset) | Elongation | Hardness | Density | Melting Range | Modulus of Elasticity | Thermal Conductivity | Electrical Resistivity |
|---|---|---|---|---|---|---|---|---|---|
| Copper Nickel 70/30 (UNS C71500) | Min. 360 MPa (52 ksi) | Min. 125 MPa (18 ksi) | Min. 30% | 80 – 100 HRB | 8.95 g/cm³ | 1170 – 1240°C (2138 – 2264°F) | 152 GPa | 29 W/m·K | 0.34 µΩ·m at 20°C |
Explore our complete range of products, specifications, materials, manufacturing capabilities and technical information in our latest product catalogue.
| Related Product | Material / Grade | Common Applications |
|---|---|---|
| Copper Nickel 70/30 Pipes | Cu-Ni 70/30 | Marine piping, seawater systems and shipbuilding |
| Copper Nickel 70/30 Tubes | Cu-Ni 70/30 | Heat exchangers, condensers and seawater applications |
| Copper Nickel 70/30 Sheets | Cu-Ni 70/30 | Marine equipment, tanks and fabricated components |
| Copper Nickel 70/30 Plates | Cu-Ni 70/30 | Shipbuilding, pressure equipment and marine structures |
| Copper Nickel 70/30 Bars | Cu-Ni 70/30 | Machined components, shafts and marine hardware |
| Copper Nickel 70/30 Fittings | Cu-Ni 70/30 | Pipe connections, seawater and offshore piping systems |
| Copper Nickel 70/30 Fasteners | Cu-Ni 70/30 | Marine assemblies and corrosion-resistant installations |
| Copper Nickel 70/30 Welded Components | Cu-Ni 70/30 | Marine fabrication, offshore systems and process equipment |
