1.the series include mn13, mn13cr2 and mn18cr2. conform to gbt 56801998, dlt 6811999, jis g 51531999, astm a 128. mn13, mn13cr2 and mn18cr2 steel casting liners for cement mill ball mill liners. 2. application: it is applicable to the working condition of strong impact, such as teeth plates, concaves and mantles of c. 3.