DC53 Cold Work Steel, Mold Steel

It has high machinability.
It has high polishability after Electrical Discharge Machining (EDM). 
It can easily be subjected to build-up welding.
It keeps high preciseness during use.
It has uniform hardness (40 HRC) between surface and interior.
We use a special melting method.
It has extremely good mirror surface polishability and provides full brightness.
It provides highly uniformed texture etching performance.
NAK 80   (Improved NAK 55 on mirror surface, EDM surface, and toughness.)
NAK 80 has the following features in addition to those noted for NAK 55. It has better mirror surface polishability.
It can be used in place of aventurine etching due to better EDM surface.