Manganese steel: The first option for compression wear is manganese steel. This alloy has a very special property, being self hardening and self healing when exposed to large amounts of compression and impact energy.
Normal standard is a 14% Mn alloy which is first option in most crushing applications. 18 % Mn alloy is a harder but also a more brittle alloy used in applications where the rock is softer (limited self hardening) but very abrasive.
When installed in applications without work hardening service life will be poor! The alloys of cast “white iron” type (High-chrome and Ni- hard) shall be avoided in crushers submitted to heavy compression.
Manganese: Needs high impaction for self hardening. If impaction is getting lower and sliding is increasing Manganese is not suitable.
High Chrome: Opposite to manganese, can take heavy sliding but is more fragile and therefore limited against impaction. Ni-hard: Somewhere between the two materials above.
Cr-Mo: Used in grinding when High Crome is too brittleThe use of chrome steel (less brittle than chrome iron) is increasing for liners.
QC Inspection Instrument