P20HThe international general plastic molding tool steel,the vacuum degasification and the ESR remelting,the sulfur content and the gas content are extremely low,the mirror surface polishing performce is splendid.After hammers rolls over the precessing and the ultrasonic wave examination does not have the fissure
718HThe miiror surface polishing performance is splendid.The eclipse grain and the EDM spark working performance is good,may the pre-hard condition delivery,not need the heat treatment to be possible to process directly again.
4CR13The inoxidizability,polishes the performance finely,is suitable in each kind of revertex product mold,more suitable special request mold(under weak acid or moist environment mold)perspex product mold for example:CD compact disc,optical instrument and so on.