Copper Alloy Machined Parts Turned Parts we have machined: Copper, OFHC, ETP 260, 360 Brass - 485 Bronze Copper Nickel Alloys Phosphor Bronze Tellurium Copper Pure copper can be a difficult to machine abrasive material. We have a lot of experience with turning and milling it. Other copper alloys present their own challenges. Lead alloyed brass is often times not desired since the European Union issued its directives. Tellurium copper can be a substitute. We have small to large quantities of most of these alloys in stock.