... :QC/T 714-2004 Material:DC04 Thickness:0.8 & Process:stretching, trimmi Detail:1)material:aluminum, steel ,brass,copper,2)usage ... :zinc/chrome/nickle plating, e-coating, anodising ...4) process:stamping,stretching, trimming,turning, drilling,punching,welding,die-casting, milling etc.5 ... :by clients' requests. metalworking cnc machining/cnc metalworking/metal working parts