Manganese steel is the material used in all crusher parts, with the exception for the blowbar. This is due to the fact that the blowbar material contains a lot of manganese. There are three trademarks that can be found in manganese steel. They are Mn22, Mn18 and Mn14. If the steel with high manganese is subjected to a very impact or the crushing stress, then its surface will get hard extremely quickly. At the same time, the inside of it will retain excellent toughness. This means that when the surface begins to harden with more adequate then it will be very good for wearing.