High Speed Steel
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| S290 PM Bohler S290 PM: Equivalent* DEX80, HAP72 |
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Chemical composition (average %)
| C | Si | Mn | Cr | Mo | V | W | Co | |
| S290 PM | 2.0 | 0.5 | 0.3 | 3.8 | 2.5 | 5.1 | 14.3 | 11.0 |
Material characteristic and use
| Properties | High speed steel produced by powder-metallurgy methods with highest red hardness, compressive strength and wear resistance. The PM technology imparts to the material also excellent toughness and machinability properties, e.g. highly satisfactory grindability. |
| Application | Heavy-duty machining tools Not only for the machining of steels but also for nonferrous metals such as nickel- base and titanium alloys. Tools used under extreme compressive stresses e.g. precision blanking tools for high-strength materials ● shaping punches ● dies |
| Hardness after tempering | 66-70 HRC |
| As-supplied condition | Annealed: max. 350 HB |
Physical characteristics
| Temperature | |||||||||
| 20 ºC | 100 ºC | 200 ºC | 300 ºC | 400 ºC | 500 ºC | 600 ºC | 700 ºC | ||
| Density | (kg/dm3) | 8.30 | |||||||
| Thermal conductivity | W/(m·K) | 19.0 | |||||||
| Specific heat | J/(kg·K) | 410 | |||||||
| Electrical resistivity | Ohm·mm2/m | 0.56 | |||||||
| Modulus of elasticity | N/mm2 | 242x103 | |||||||
| Thermal expansion | 10-6m/(m·K) | 9.6 | 10.0 | 10.3 | 10.6 | 10.9 | 11.2 | 11.6 | |
* Chemical composition is only reference and might not be the same
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