UNS c75700 nickel silver is a popular copper alloy with high strength and corrosion resistance properties, making it ideal for various industrial applications. It comprises copper, zinc, and nickel in varying proportions and has a unique silver-like appearance that makes it a popular choice in the jewellery and decor industry. This blog will look closely at UNS c75700 nickel silver, composition, physical and mechanical properties, uses, hardness, heat treatment, welding, and corrosion resistance.
UNS C75700 Nickel Silver Composition
UNS c75700 nickel silver is a copper-nickel-zinc alloy with varying compositions. It usually consists of 10-20% nickel, 10-20% zinc, and copper. The exact chemical composition of UNS c75700 nickel silver can vary depending on the manufacturer’s specifications.
| Element | Content (%) |
|---|---|
| Cu | 65 |
| Zn | 23 |
| Ni | 12 |
UNS C75700 Nickel Silver Physical Properties
UNS c75700 nickel silver has excellent electrical conductivity, making it useful in electrical and electronic applications. It has a density of 8.72 g/cm³ and a melting point of 1,080°C. The alloy has a unique silver-like appearance, and its colour changes with oxidation. It shows good thermal conductivity, which makes it ideal for heat transfer applications.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.69 g/cm3 | 0.314 lb/in³ |
UNS C75700 Nickel Silver Mechanical Properties
UNS c75700 nickel silver exhibits high tensile strength and good flexibility. At room temperature, its tensile strength ranges from 680-800 MPa and its elongation ranges from 23-30%. Its fatigue strength is excellent and withstands bending and twisting conditions.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 359-641 MPa | 52100-93000 psi |
| Yield strength (depending on temper) | 124-545 MPa | 18000-79000 psi |
| Elongation at break (in 50.8 mm) | 48% | 48% |
| Elastic modulus | 117 GPa | 17000 ksi |
| Poisson’s ratio | 0.34 | 0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100) | 20 | 20 |
| Shear modulus | 47 GPa | 6820 ksi |
UNS C75700 Nickel Silver Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@ 20-300°C/68-572°F) | 16.2 µm/m°C | 9.00 µin/in°F |
| Thermal conductivity (@20°C/68°F) | 40 W/mK | 278 BTU in/hr.ft.°F |
UNS C75700 Nickel Silver Equivalent
- ASTM B151
- ASTM B206
- QQ W321
UNS C75700 Nickel Silver Uses
Due to its strength and corrosion resistance properties, UNS c75700 nickel silver is widely used in industrial applications such as marine engineering, automotive, and aerospace. It is used in producing coinage, musical instruments, electrical and electronic connectors, and bearings, among others.
UNS C75700 Nickel Silver Hardness
UNS c75700 nickel silver has a maximum hardness of 165HB. The hardness can, however, be increased through a suitable heat treatment process.
UNS C75700 Nickel Silver Heat Treatment
UNS c75700 nickel silver is an easily workable alloy that can endure cold and warm processing. It can be annealed to remove any internal stresses and increase its ductility. The maximum annealing temperature is usually between 500-700°C.
UNS C75700 Nickel Silver Welding
UNS c75700 nickel silver is highly resistant to tarnishing and corrosion. It can be welded using traditional methods, including gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW).
UNS C75700 Nickel Silver Corrosion Resistant
UNS c75700 nickel silver is highly resistant to various forms of corrosion, such as pitting, crevice, and stress corrosion cracking. Its corrosion resistance properties are useful in harsh environments such as marine and chemical applications.
Conclusion
UNS c75700 nickel silver exhibits excellent strength, corrosion resistance, flexibility, and conductivity properties, making it a popular choice in various industrial applications. Its unique silver-like appearance makes it a favourite in the jewellery and decor industry. Understanding its composition, properties, and applications is crucial in determining its suitability for specific applications. Whether in marine engineering, automotive, aerospace, or electrical and electronic applications, UNS c75700 nickel silver is a reliable choice.
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