ASSAB 718 Supreme
VERY GOOD POLISHING AND PHOTO ETCHING PROPERTIES
ASSAB 718 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. ASSAB 718 Supreme is supplied at 290-330 HB.
- 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%
- Weldability 60%
- Toughness 90%
Chemical composition
| Carbon | 0.37 | Silicon | 0.30 | Manganese | 1.40 |
| Chromium | 2.00 | Molybdenum | 0.20 | Nickel | 1.00 |