... long using time ,and wearing resistance !We add the Manganese Elements in the Steel ,It is of high hardness and ... , mine, metallurgy, chemical industry , cement ,petroleum etc. 3)Material: high manganese steel : Mn13% , Mn18%, Mn24% High chromium iron : Cr20 , Cr24 ... inspection undamaged testing equipment 5) Major wear parts : High Manganese parts Fixed Jaw Plate Swing Jaw Plate Upper cheek plate ...