... Certification: ISO9001:2008 CNC Sheet Metal Box Through its CNC punches and CNC bending machines, our company offers ... Malleable iron; Tungsten steel, etc.Machining processesMetal fabrication, machining, welding, forming, shaping, punching, drilling, turning, milling, grinding ... rolling, stamping, deep drawing, bending, spot or seam welding, spinning, forging, sand casting, die casting, investment ...