John Prosock Machine, Inc., a CNC machine shop in PA, has years of experience in steel and stainless steel precision CNC machining. Generally, steel is malleable, strong, and versatile enough to be used in various end product or system applications; however, different grades demonstrate different machinability characteristics. John Prosock Machine can recommend the best steel based on your job requirements. There are essentially two types of steel, carbon and alloy. Listed below are some examples of the carbon and alloy steels we can machine and the possible uses of each.