Alloy
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.
Restrictions:
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.
![Alloy Alloy](https://matecsolutions.com/wp-content/uploads/2022/06/3049847.png)
![Alloy Alloy](https://matecsolutions.com/wp-content/uploads/2022/06/3049848.png)
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.
![Alloy Alloy](https://matecsolutions.com/wp-content/uploads/2022/06/3049849.png)
QC Inspection Instrument
![Hardness Tester Hardness Tester](https://matecsolutions.com/wp-content/uploads/2022/06/3146005.jpg)
Hardness Tester
![Spectrograph Spectrograph](https://matecsolutions.com/wp-content/uploads/2022/06/3146009.jpg)
Spectrograph
![Impact Tester Impact Tester](https://matecsolutions.com/wp-content/uploads/2022/06/3146007.jpg)
Impact Tester
![Metallographic analysis Metallographic analysis](https://matecsolutions.com/wp-content/uploads/2022/06/3146008.jpg)