工程机械钢 Steel for engineering machinery | 35MnB系列45B系列 40Mn2 40CrB 15B35Cr S43CB S48CB SCr440B KT-B11E0621 | Ф20~350 | 供货技术条件 技术协议 Technical agreement for supply Technical protocol | 用于制作工程机械的链轨节、销轴、销套、支撑轮。 Used for making the chain link, pin shaft,pin sleeve and support wheel of construction machinery. |