... )4.Bronze: C51000, C52100, C54400, etc5.Iron: 1213, 12L14,12156.Aluminum: Al6061, Al6063 etc7,.Carbon steel: C1006,C1010,C1018,C1022,C1035K ... , Warehouse and Workshop show 4,Manufacture Process 5,Quality Control 6, Strong Package 7,Customer Feedback and Evaluation 8,We are ...