Borgers Jaw crushers Typical solution is to start with manganese steel linings to run the process up to target capacity and gradation. The maximizing of chamber life takes place when the process is stable. Several low alloys of quenched and tempered steel as well as tool steel and chromium iron are available for specific applications. Jaw Plates for Jaw Crushers The crushing chamber is composed of a Stationary /Fixed Jaw (frame side) and a Movable/ Swing Jaw (pittman side), and they may be one p...