Stavax ESR is a premium grade stainless tool steel with the following properties:
- Good corrosion resistance
- Excellent polishability
- Good wear resistance
- Good machinability
- Good stability in hardening
The combination of these properties gives a steel with outstanding production performance. The practical benefits of good corrosion resistance in a plastics mould can be summarised as follows:
- LOWER MOULD MAINTENANCE COSTS
The surface of cavity impressions retain their original
finish over extended running periods.
Moulds stored or operated in humid conditions
require no special protection.
- LOWER PRODUCTION COSTS
Since water cooling channels are unaffected by
corrosion (unlike conventional mould steel), heat
transfer characteristics, and therefore cooling
efficiency, are constant throughout the mould life,
ensuring consistent cycle times.
These benefits, coupled with the high wear resistance of Stavax ESR, offer the moulder low-maintenance long-life moulds for the greatest overall moulding economy.
Note: Stavax ESR is produced using the ElectroSlag-Refining (ESR) technique, resulting in a very low inclusion content.
Stavax ESR is recommended for all types of moulding tools and its special properties make it particularly suitable for moulds with the following demands:
- CORROSION/STAINING RESISTANCE
i.e. for moulding of corrosive materials, e.g. PVC,
acetates, and for moulds subjected to humid working/
- WEAR RESISTANCE
i.e. for moulding abrasive/filled materials, including
injection-moulded thermosetting grades. Stavax ESR is
recommended for moulds with long production runs,
e.g. disposable cutlery and containers.
- HIGH SURFACE FINISH
i.e. for the production of optical parts, such as camera
and sunglasses lenses, and for medical containers, e.g.
syringes, analysis phials.