C15000 Zirconium Copper 

Chemical Composition:

Zr: 0.10-0.20%
Cu: Min.99.8%
Note: Copper plus additions equal 99.90% minimum.

Typical Physical Properties:
Density at 68F: 0.321 Lbs./in.3
Specific Gravity: 8.89
Melting Point (Liquidus): 1080C (1976F)
               (Solidus): 980C (1796F)
Coefficient of Thermal Expansion per F: 9.4 x 10-6 (68-212F)
9.8 x 10-6 (68-572F)
11.2 x 10-6 (68-1200F)
Electrical Conductivity at 68F (volumetric): 85-95% IACS (aged and drawn)
                                               55-72% IACS (solution annealed)
Thermal Conductivity Btu/ft.2/ft./hr./F at 68F: 212
Modulus of Elasticity - Tension: 18,700 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.C15000, RWMA Class 1, SAE J461,463; ISO5182-1991

European Standards: CuZr, DIN 2.1580, CW120C to EN