Speciality: Excellent polishing performance; good mechanical processing performance; pre-hardened plastic mould steel; suitable for chrome plating and etching; good toughness . Limit for the use; trading limits: The plastic mould with the thickness over 400mm; mould for closure of TV sets and trunks; mould for closures of copying machines; mould for vibration absorber; mould for motor dashboards and large parts; mould for dustbins; mould cavity for die cast.