C18000 Copper Chromium Nickel Silicon

Chemical Composition:

Cr: 0.10-0.80%
Ni: 1.80-3.0%
Si: 0.40-0.80%
Cu: Balance
Note: Copper plus additions equal 99.50% minimum.

Typical Physical Properties:
Specific Gravity: 8.84
Melting Point: 1074C
Coefficient of Thermal Expansion per C: 16.2 x 10-6 (20-300C)
Electrical Conductivity (% IACS): 38 (22 Ms/m)
Thermal Conductivity (W/mk): 200 
Modulus of Elasticity (10 3 MPA): 130

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.C18000, CDA180, RWMA Class 3

European Standards: CuCrNi2Si, DIN 2.0855, CW111C to EN

Note: 
ASTM: American Society for Testing and Materials 
RWMA: Resistance Welder Manufacturers' Association