UNS C18150 Copper Chromium Zirconium Alloy

CuCr1Zr – UNS.C18150 Copper Chrome Zirconium C18150 is an outstanding and unique copper alloy that has high electrical conductivity, hardness and ductility, moderate strength, and excellent resistance to softening at elevated temperatures. The addition of 0.1% zirconium (Zr) and 1.0% chromium (Cr) to copper produces a heat treatable alloy that can be solution treated and then aged to produce these desirable properties. Bars are typically supplied from the mill in the fully aged and drawn condition so that no further heat treatment is required by the manufacturer. The softening temperature of properly heat treated C18150 bar exceeds 500°C, while pure copper softens at 200°C and silver-bearing copper softens at 350°C.

In addition, there is much evidence that C18150 exhibits less sticking and longer resistance to deformation than C18200 in certain specific circumstances.

Typical Applications of C18150 Chrome Zirconium Copper Alloy:

Electrical Industry: Resistance Welding Electrodes, Circuit Breaker Switches

Consumer Goods: Welding Rod Extenders, Pencil Type, Light Duty Welding Guns, Welding Tips

Industrial: Welding Wheels, Welding Tips and Welding Rod Extenders for Resistance Seam and Spot Welding

Available Sizes:
Custom Diameters and Sizes, Random Mill Lengths

Available Products (Forms):
Round Bars, Flat Bars, Square Bars, Rectangular Bars, Hexagonal Bars, Plates

Custom Shapes Available on Request.

Chemical Composition:

Cr: 0.50-1.50%
Zr: 0.05-0.25%
Cu: Balance
Note: Copper plus additions equals at least 99.70%.

Typical Physical Properties:

Density at 68°F: 0.321 lb/cubic inch
Specific Gravity: 8.89
Melting Point (Liquidus): 1080°C (1976°F)
(Solidus): 1070°C (1958°F)
Coefficient of Thermal Expansion per °F: 9.5 x 10-6 (77-212°F)
Electrical Conductivity (Volume) at 68°F: 80% IACS (Aged and Tensile)
Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F: 187
Modulus of Elasticity - Tensile: 17,000 ksi

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