Cold Work Tool Steel
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| K340 Bohler K340: Equivalent* DC53 |
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Chemical composition (average %)
| C | Si | Mn | Cr | Mo | V | Other | |
| K340 | 1.10 | 0.70 | 0.40 | 8.20 | 2.10 | 0.50 | +Al,Nb |
Material characteristic and use
| Properties | High toughness and outstanding compressive strength, good dimensional stability, outstanding EDM machinability. |
| Application | Forming and punching tools e.g. dies and punches, cold working tools e.g. tools for deep drawing or extrusion, coining tools, bending tools, thread rolling tools, industrial knives, machine components (e.g. guide rails) |
| Hardness after tempering | 57-63 HRC |
| As-supplied condition | Annealed: max 235 HB |
Physical characteristics
| Temperature | |||||||||
| 20 ºC | 100 ºC | 200 ºC | 300 ºC | 400 ºC | 500 ºC | 600 ºC | 700 ºC | ||
| Density | (kg/dm3) | 7.68 | |||||||
| Thermal conductivity | W/(m·K) | 17.8 | |||||||
| Specific heat | J/(kg·K) | 490 | |||||||
| Electrical resistivity | Ohm·mm2/m | 0.64 | |||||||
| Modulus of elasticity | N/mm2 | 206x103 | |||||||
| Thermal expansion | 10-6m/(m·K) | 11.2 | 11.8 | 12.3 | 12.7 | 12.9 | 13.1 | 13.1 | |
* Chemical composition is only reference and might not be the same
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