Wrought Copper Alloys are produced mainly through the extrusion and/or rolling method. This method is different than the casting method used to produce cast bronze alloys. Different methods of manufacture usually mean different mechanical and physical properties. The chart below displays the machinability rating for a number of common wrought copper alloys. Use this chart as reference when quoting and machining parts from wrought copper alloys such as C63000 Nickel Aluminum Bronze.