C71500 70/30 – COPPER NICKEL

Standards	MIL-C-15726FASME SB-171ASTM B 171
UNS Designation Number	70-30 (UNS C71500)
Nominal Chemicals	70-30: Copper 69.5%, Nickel 30.0%, Iron 0.5%
Machinability	20
Average Tensile Mechanical Properties	40000 psi
Average Yield Mechanical Properties	15000 psi

Widely used in marine applications where resistance to both corrosion and biofouling is important. C715 Cupro-Nickel is a 70/30 copper-nickel alloy that is almost entirely resistant to stress corrosion and is ideal when used in applications involving high-velocity polluted seawater. Typical 715 CuNi applications for use in the chemical and desalination industries include tubes and tubesheets for condensers, evaporators and heat exchangers; tubes for carrying seawater; valve bodies; pump bodies and impellers.