Copper Nickel Alloy UNS C70600 – Composition, Properties, and Uses
When choosing a suitable material for a project, various factors need to be considered, including the properties and uses of the material. One such material widely used in engineering applications is UNS C70600. But what exactly is UNS C70600? This blog post will discuss its composition, physical and mechanical properties, uses, and heat treatment.
UNS C70600 Composition
UNS C70600 is a copper-nickel alloy with a copper content of 90% and a nickel content of 10%. It also contains minor amounts of iron and manganese. The alloy has excellent corrosion, erosion, and biofouling resistance in seawater and other environments. It is also highly resistant to stress corrosion cracking and pitting.
| Element | Content (%) |
|---|---|
| Cu | 88.7 |
| Fe | 13 |
| Ni | 10 |
UNS C70600 Physical Properties
UNS C70600 has a density of 0.323 lb/in³ and a melting point of 2260°F. It has a thermal conductivity of 29.6 Btu/(hr)(ft²)(°F) and a coefficient of thermal expansion of 9.04 µin/in-°F. The electrical conductivity of the alloy is 3% IACS (International Annealed Copper Standard).
UNS C70600 Equivalents
| ASME SB111 | ASME SB171 | ASME SB359 | ASME SB395 |
| ASME SB466 | ASME SB467 | ASME SB543 | ASTM B111 |
| ASTM B151 | ASTM B122 | ASTM B171 | ASTM B359 |
| ASTM B395 | ASTM B432 | ASTM B466 | ASTM B469 |
| ASTM B543 | ASTM B608 | DIN 2.0872 | MIL C-15726 |
| MIL T-15005 | MIL T-16420 | MIL T-22214 | SAE J461 |
| SAE J463 |
UNS C70600 Mechanical Properties
UNS C70600 has excellent mechanical properties, such as high tensile strength, yield strength, and hardness. The tensile strength of the alloy ranges from 75 ksi to 110 ksi, while the yield strength ranges from 25 ksi to 55 ksi. The elongation at break ranges from 5% to 45%. The alloy’s hardness ranges from 70 HRB to 90 HRB.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 303-414 MPa | 43900-60000 psi |
| Yield strength (depending on temper) | 110-393 MPa | 16000-57000 psi |
| Elongation at break (in 254 mm) | 42% | 42% |
| Elastic modulus | 117 GPa | 17000 ksi |
| Poisson’s ratio | 0.34 | 0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100) | 20 | 20 |
| Shear modulus | 52.0 GPa | 7540 ksi |
UNS C70600 Uses
UNS C70600 is widely used in engineering applications, such as heat exchangers, condenser tubes, seawater piping systems, and marine hardware. Its excellent resistance to corrosion makes it ideal for use in seawater and other harsh environments. The alloy is also used in the oil and gas industry, where it is used for pipeline transportation, refining, and storage facilities.
UNS C70600 Heat Treatment
UNS C70600 can be annealed at temperatures ranging from 1100°F to 1600°F for 10 minutes per inch of material thickness. Post-annealing rapid quenching is recommended to prevent grain growth. The alloy can also be hardened by cold working, which increases its tensile strength and hardness.
Conclusion:
UNS C70600 is a copper-nickel alloy with excellent corrosion, erosion, and biofouling resistance. It has excellent mechanical properties and is widely used in engineering applications, such as heat exchangers, condenser tubes, and seawater piping systems. The alloy can be annealed and hardened by cold working. Its uses and performance have made it a popular choice for various industries.
Sakshee is a talented blogger, with a particular focus on the Business and Metal Industry. She is passionate about sharing her insights on various metal products and helping professionals to make a better decisions.
