6.2 Steel forgings and rolled pieces

6.2.1 Carbon steel forgings and rolled pieces should be of Grade 20,Grade 25, Grade 35, Grade 45 in GB/T 699 or JB/T 6397Specification for the Heavy Carbon Structural Steel Forgings, andother grades of steel meeting the working conditions.6.2.2 The forgin ......（本文共 928 字 ）     [阅读本文] >>