... , Carbon Steel, Aluminum, Brass, Bronze or specified 3. Casting, Machining, Metalworking, Sheet Metal Bending, Surface Treatment, Heat Treatment, Griding, Milling, wire ... steel, Zinc alloy, copper/bronze/iron/etc.Process TechnologyCasting, Machining, Metalworking, Sheet Metal Bending, Surface Treatment, Heat Treatment, Griding, Milling, wire ...