Whenever melting applications require phosphor copper, Metallurgical Products is the source you can depend on for metal that meets your requirements, delivered on time. For over 60 years, we have been manufacturing and supplying phosphor copper to the copper and brass melting industry throughout the world.15% Phosphor Copper – recognized for its quality and performance in deoxidizing alloys, increasing fluidity, and inhibiting gas porosity.8% Phosphor Copper – used primarily in the production of 390 alloy aluminum as a grain refiner to enhance strength, wear resistance, and machinability of this aluminum-silicon casting alloy.