... Steel alloy:carbon steel/dei steel/etc5.Other special materials:copper/bronze/iron/etcWe handle many other ... materials are not listed above. Process technologyCasting, Machining, Metalworking, Sheet Metal Bending, Surface Treatment, Heat Treatment, Griding, Milling ... We can provide samples(one piece)before substantial orders. Surface treatmentBlacking, Polishing, Anodize, Chrome plating, Zinc plating, ...