Uddeholm Impax Supreme is prehardened mould steel with very good polishing and photo etching properties. It is suitable for a wide range of injection moulds, blow moulds and extrusion dies for plastic. Uddeholm Impax Supreme is supplied at 290-330 HB. In east/south east asian countries served by Assab, Uddeholm Impax Supreme is sold as AS 718 Supreme.
Prehardened gives following benefits:
No hardening risks
No hardening costs
Time saving, e.g. no waiting for heat treatment
Lower tool cost (e.g. no distortion to rectify)
Modifications easily carried out
Can be subsequently nitrided to increase surface wear resistance or locally flame hardened to reduce surface damage