Semih Metals, based in Istanbul, Turkey, has made quite a name for itself as a top-notch manufacturer and supplier of Copper Nickel 70/30 Forgings, serving clients all around the globe. The company prides itself on its commitment to durability, precision, and adherence to international standards, providing forging solutions that stand out for their strength, corrosion resistance, and long-lasting performance. These Copper Nickel 70/30 Forgings are crafted specifically for tough environments, offering exceptional protection against seawater corrosion and biofouling. By blending cutting-edge manufacturing techniques with a customer-first approach and prompt delivery, Semih Metals has built a solid reputation as a reliable supplier of high-performance copper-nickel forgings for critical industrial and marine applications worldwide.
The Copper Nickel 70/30 Forgings consist of roughly 70% copper and 30% nickel, with a touch of iron and manganese added to boost strength and seawater corrosion resistance. This alloy showcases a tensile strength ranging from about 350 to 480 MPa and a yield strength of around 130 MPa, all while maintaining impressive ductility and toughness. Renowned for its excellent thermal stability and resistance to stress corrosion cracking, it performs consistently well under varying temperature and pressure conditions. The combination of its remarkable mechanical strength and corrosion resistance makes Copper Nickel 70/30 Forgings perfect for demanding applications in marine, chemical, and industrial settings.
| Standard | DIN, ASTM, BS and all International Standards |
|---|---|
| Flat bar blocks | up to 27″ width and 15,000 lbs |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
| 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 |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Copper Nickel 70-30 | 0.323 lb/in3 at 68 F | 2260 F | 50000 psi | 20000 psi | 30 % |
| STANDARD | WERKSTOFF NR. | UNS |
| Copper Nickel 70/30 | 2.0882 | C71500 |
The durability of Copper Nickel 70/30 forgings is ensured by excellent corrosion resistance, high tensile strength, superior weldability, resistance to seawater, anti-biofouling properties, and consistent alloy composition for enhanced performance.
Copper Nickel 70/30 forgings offer superior strength, enhanced corrosion resistance, improved material utilization, reduced waste, better grain structure, and higher durability compared to machining, making them ideal for demanding applications.
Compatible welding processes for Copper Nickel 70/30 forgings include TIG (GTAW), MIG (GMAW), and shielded metal arc welding (SMAW), ensuring strong joints, excellent corrosion resistance, and minimal thermal distortion.
These forgings are widely utilized in industries that require outstanding seawater resistance and mechanical strength. They’re commonly found in shipbuilding and offshore sectors for seawater piping systems, pump components, valves, and heat exchangers. In desalination plants and power generation facilities, you’ll find them in condenser tubes, cooling systems, and evaporators. The chemical processing industry also relies on them for equipment that handles corrosive fluids and gases. Their resistance to biofouling makes them a great choice for marine hardware and hull components.






We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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