Uddeholm QRO 90 Supreme
EXCELLENT HIGH TEMPERATURE STRENGTH AND HOT HARDNESS
With its outstanding thermal fatigue resistance, thermal conductivity and temper back resistance Uddeholm QRO 90 Supreme excels as a tool steels where tools tempers down quickly to lower hardness. In applications such as hot stamping, brass forging, die casting core inserts and brass extrusion.
- Excellent high temperature strength and hot hardness
- Very good temper resistance
- Unique resistance to thermal fatigue
- Excellent thermal conductivity
- Good toughness and ductility in longitudinal and transverse directions
- Uniform machinability
- Good heat treatment properties
- Hot wear resistance 55%
- Plastic deformation resistance 60%
- Heat checking resistance 80%
- Premature cracking resistance 35%
Reference Grade Hot Work (H13)
- Hot wear resistance 40%
- Plastic deformation resistance 40%
- Heat checking resistance 40%
- Premature cracking resistance 35%
Chemical composition
| C | 0.38 | Si | 0.30 | Mn | 0.80 |
| Cr | 2.60 | Mo | 2.30 | V | 0.90 |
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