Uddeholm Impax Supreme
VERY GOOD POLISHING AND PHOTO ETCHING PROPERTIES
Uddeholm Impax Supreme is prehardened mold steel with very good polishing and photo etching properties. It is suitable for a wide range of injection molds, blow molds 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
- Good polishing and photo-etching properties
- Good machinability
- High purity and good homogeneity
- Uniform hardness
- Machinability 50%
- Wear resistance 30%
- Corrosion resistance 60%
- Toughness 90%
Chemical composition
| C | 0.37 | Si | 0.30 | Mn | 1.40 |
| Cr | 2.00 | Mo | 0.20 | Ni | 1.00 |