ThePipingMart Blog Grades UNS C18150 Copper Chromium Zirconium Alloy – Composition, Properties, and Uses

UNS C18150 Copper Chromium Zirconium Alloy – Composition, Properties, and Uses

UNS C18150

Regarding materials engineering, copper alloys have been among the most popular and widely-used materials for a long time. These alloys have several desirable properties that make them useful in various applications across different industries. UNS C18150 is a high-performance copper alloy highly valued for its strength, durability, and resistance to corrosion. This comprehensive guide will dive into the properties, uses, and other essential aspects of UNS C18150.

UNS C18150 Composition

UNS C18150 is a copper-nickel beryllium alloy that contains about 1.8% nickel, 0.5% cobalt, and 0.2% beryllium. The alloy is designed to enhance its strength and durability, making it suitable for high-stress applications such as bushings, gears, and electrical connectors. The low beryllium content in the alloy makes it safe for use in most applications.

Element Content (%)
Cr 1
Cu 98.85
Zr 0.15

UNS C18150 Mechanical Properties

UNS C18150 is a high-strength alloy with excellent mechanical properties such as high elastic modulus, yield, and tensile strength. The alloy can withstand high levels of stress and strain, making it ideal for use in high-pressure and high-temperature environments. It has an ultimate tensile strength of 1,050 MPa and a hardness of 250 HV.

Properties Metric Imperial
Hardness, Rockwell B (@ 50.8 – 76.2 mm/ 2.00 – 3.00 in.) 65 65
Hardness, Rockwell B (@ 25.4 – 50.8 mm/ 1.00 – 2.00 in.) 70 70
Hardness, Rockwell B (@ 25.4 mm/1.00 in., heat treated) ≥ 75 ≥ 75
Tensile strength at break (any thickness) ≥ 379 MPa ≥ 55000 psi
Yield strength (@ 0.500%, any thickness) ≥ 379 MPa ≥ 55000 psi
Modulus of elasticity 117 GPa 17000 ksi
Poisson’s ratio 0.181 0.181
Shear modulus 49.6 GPa 7200 ksi

UNS C18150 Physical Properties

The physical properties of UNS C18150 are also remarkable, with a density of 8.83 g/cm3, a melting point of 1,085°C, and a thermal conductivity of 57 W/mK. It also exhibits good electrical conductivity, ideal for electrical and electronic applications.

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/in3

UNS C18150 Uses

UNS C18150 is widely used in the aerospace, defence, electronics, and automotive industries. Its strength and durability make it perfect for use in parts exposed to high loads and stresses, such as bearings, bushings, and other mechanical components. The alloy also manufactures connectors, switches, and other electrical components.

UNS C18150 Corrosion Resistance

UNS C18150 has excellent corrosion resistance, making it suitable for harsh environments. It has good oxidation and chemical corrosion resistance, making it ideal for marine and offshore applications. The alloy is also immune to hydrogen embrittlement, a phenomenon that can weaken other copper alloys.

UNS C18150 Heat Treatment

UNS C18150 can be heat-treated to enhance its mechanical properties, such as strength and hardness. The heat treatment process involves heating the alloy to a specific temperature and holding it there for a specified duration, followed by cooling in a controlled manner. The heat treatment process helps to relieve internal stress and enhances the material’s mechanical properties.

UNS C18150 Machining and Welding

UNS C18150 is considered easy to machine using conventional machining techniques. The alloy produces good surface finishes, and its wear resistance can be improved by adding lubricants during machining. Welding UNS C18150 is possible using standard welding techniques such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW).


UNS C18150 is a high-performance copper alloy with excellent mechanical and physical properties, making it suitable for use in different industries such as aerospace, defence, and electronics. Its high strength, durability, and corrosion resistance make it ideal for harsh environments. The material can be heat-treated to enhance its mechanical properties, and it is easy to machine and weld using standard techniques. This comprehensive guide has provided you with all the information you need about UNS C18150, and we hope it will be helpful in your future projects.

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