Process: general sheet metal processing materials used in cold-rolled plate (SPCC), hot-rolled plates (SHCC), galvanized sheet (SECC, SGCC), copper (CU) brass, copper, beryllium copper, aluminum (6061, 5052,1010,1060,6063, duralumin, etc.), aluminum, stainless steel (mirror, brushed, matte), according to the role of the different products, use of different materials, which normally takes from product use and cost up to consider it. 1. Cold-rolled plate SPCC, mainly used in electroplating and paint parts, low cost, easy to shape, material thickness ≤3.2mm. 2. Hot-rolled plates SHCC, material T≥3.0mm, also by electroplating, painting parts, low cost, but it is difficult shape, mainly used flat pieces. 3. Galvanized sheet SECC, SGCC. SECC electrolytic plate material points N, P material, N materials mainly without surface treatment, high costs, P material for coating parts. 4. Copper; the role of the main conductive materials and parts, the surface treatment is nickel, chrome, with or without treatment, high costs. 5. Aluminum; general surface chromate (J11-A), oxidation (conductive oxide, chemical oxidation), high cost, there are silver-plated, nickel-plated. 6. Aluminum; sectional structure of complex materials and parts used extensively for a variety of plug box. Surface treatment with aluminum. 7. Stainless steel; mainly used without any surface treatment ,, high cost. Processing technology: bending, flanging, blanking, punching, bending, bulging type, drawing, assembly process welding, riveting and screw fastening iron parts processing, metal processing Changzhou, residential fence processing www.pjxdbjc. com