... metal part made by 4.5mm cold roll steel with powder coating.This part involves the processes cutting,punching and welding. ... Steel (304, 310, 316, 439), Aluminium, Angle, Tube, Flat bar, etc.Founded in 2000, SHANGHAI CHAOYING METALLIC PRODUTS Co., Ltd ... welding, assembling and machining.As a professional sheet metal fabrication factory, we house such equipment as laser cutter, CNC hydraulic turret ...