Chromium Zirconium Copper Alloys

It is an excellent and unique copper alloy with high electrical conductivity, hardness, and ductility, moderate strength.

CuCr1Zr--- UNS.C18150 Chromium Zirconium Copper C18150 is an excellent and unique copper alloy with 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 results in a heat treatable alloy which may be solution treated and subsequently aged to produce these desirable properties.  Rod is usually supplied from the mill in the fully aged and drawn condition so no further heat treatment is required by the fabricator.  The softening temperature of properly heat treated C18150 rod exceeds 500°C as compared to unalloyed pure copper which softens at 200°C, and silver bearing coppers which soften at 350°C

Typical Application for C18150 Chromium Zirconium Copper Alloys:

Electrical Industry: Resistance Welding Electrodes, Circuit Breaker SwitchesConsumer: Rod Extensions, Pencil-type, Light Soldering Guns, TipsIndustrial: Welding Wheels, Tips and Rod extensions for resistance seam and spot welding

Available Sizes:Custom Diameter & Sizes, Random Mill lengths

Available Products (forms):Round bars, Flat bars, Square bars, Rectangular bars, Hexagon bars, PlatesCustom shapes are available upon request.

Chemical Composition:

Cr: 0.50-1.50%Zr: 0.05-0.25%Cu: BalanceNote: Copper plus additions equal 99.70% minimum.

Typical Physical Properties:Density at 68°F: 0.321 Lbs./In.3Specific Gravity: 8.89Melting 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 at 68°F (volumetric): 80% IACS (aged and drawn)Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F: 187Modulus of Elasticity - Tension: 17,000 ksi

Note: 1). the units are based upon US Customary.2). the typical physical properties apply to age hardened products.

International Specification:

Rods/Bars/Plates/Sheets: UNS.C18150, SAE J461,463;RWMA Class 2, ISO5182-1991

European Standards: CuCr1Zr, DIN 17666 2.1293, CW106C to EN

Note: ASTM: American Society for Testing and Materials SAE: Society of Automotive Engineers RWMA: Resistance Welder Manufacturers' Association Note: Unless otherwise specified, material will be produced to ASTM & RWMA.

Mechanical Properties:The detailed Mechanical Properties will be available on request from customers.

Most Commonly Temper Used:

Rods/Bars/Tubes: AT(TF00), HT (TH04)Plates: AT(TF00), HT(TH04)

Chromium Zirconium Copper Alloys