Manganese Steel: This is used for grid liners and generally smaller mills. Its great advantage is that it works hardens under stress, yet the substrate remains tough and can withstand extreme impact without fracture. Its primary disadvantage is that it spreads with impact, so solid liners begin to squeeze together and become extremely difficult to remove, and can damage a mill shell if the stress is allowed to build up to an extreme level.
When it comes to manganese mill liners, MGS Casting is one of the largest austenitic manganese steel cast foundries in China. With over 30 years of cast technology, Our austenitic manganese steel mill liners span life more than other foundries.
The hardness of manganese steel in the solution annealed and water quenched condition is normally around 220 HB. It is possible to strain to harden this material to approximately 500 HB. In order to achieve this high hardness level, the impact loading must be high while the material wearing away from gouging abrasion is limited. It is typical in crushing applications where the main wear mechanism is gouging abrasion that the manganese steel will harden to some intermediate level, typically 350-450 HB.