Description
Chemical composition (nom.)
– Cu Rest.
– Be 1.8-2.1%
– Co+Ni 0.2-0.6%
Max impurities
– Other 0.5% max.
Physical properties
Mean linear coefficient of thermal expansion (10-6/K): 17
Thermal conductivity (W/mK): 120
Electrical conductivity (m/W ohm mm²): 12-15
Elastisity modulus E (kN/mm²): 133
Density (g/cm3): 8.25
Mechanical properties (nom.)                                                                                                                                 Yield strength (Rp N/mm²): 350 N/mm²
Tensile strength (Rm N/mm²): 400 N/mm²
Elongation in % A5: 15%
Hardness/Brinell: 160 HB
Hardness/Rockwell: 36-40 HRC
