Be: 1.80-2.00%
Co+Ni: 0.20% Min.
Co+Ni+Fe: 0.60% Max.
Cu: Balance
Note: Copper plus additions equal 99.5% minimum.

Density (g/cm3): 8.36
Density before age hardening (g/cm3): 8.25
Elastic Modulus (kg/mm2 (103)): 13.40
Thermal Expansion Coefficient (20 °C to 200 °C m/m/°C): 17 x 10-6
Thermal Conductivity (cal/(cm-s-°C)): 0.25
Melting Range (°C): 870-980 °C
Note:
1). the units are based upon Metric.
2). the typical physical properties apply to age hardened products.

1). Electrical Industry: Electrical Switch and Relay Blades
2). Fuse Clips, Switch Parts, Relay parts, Connectors, Spring Connectors
3). Contact Bridges, Belleville Washers, Navigational Instruments
4). Clips Fasteners: Washers, Fasteners, Lock Washers
5). Retaining Rings, Roll Pins, Screws, Bolts Industrial: Pumps, Springs,
6). Electrochemical, Shafts, Non Sparking Safety Tools, Flexible Metal Hose,
7). Housings for Instruments, Bearings, Bushings, Valve Seats, Valve Stems,
8). Diaphragms, Springs, Welding Equipment, Rolling Mill Parts,
9). Spline Shafts, Pump Parts, Valves, Bourdon Tubes, Wear Plates on Heavy Equipment.

More range of copper and copper alloys, in full series of shapes: Sheet, Rod, Pipe, Strips and Wire list as below:

C17000/170 (CuBe1.7, 2.1245, Alloy165)
C17200/172 (CuBe2, 2.1247, Alloy25)
C17300/173 (CuBe2Pb, 2.1248, AlloyM25)
C17500/175 (CuCo2Be, 2.1285, Alloy10)
C17510/1751 (CuNi2Be, 2.0850, Alloy3)
CuCoNiBe (CuCo1Ni1Be, 2.1285, CW103C)
C15000,/150, C18000/180, C18150/181, C18200/182
CuZr, CuNi2CrSi, CuCr1Zr, CuCr