Metal fabrication is the creation of metal structures by cutting, bending and assembling processes. It is a value-added process involving the creation of machines, parts, and structures from various raw materials. The popularly applied material in metal fabrication are SPCC, SECC, SGCC, SUS301 and SUS304. And the fabrication production methods include shearing, cutting, punching, stamping, bending, welding and surface treatment, etc.