20MnCrNiMo4-2-2* or 8720 as it is also named in US standards, is a case hardening steel used in forgings to eg rock drilling tools.
For additional Heat Treatment Data, please visit the Heat Treatment Guide.
* Designation followed by "*" is not an official EN standard grade but named according to the rules in EN 10027.
Other properties (typical values)
|Youngs module (GPa)||Poisson´s ratio (-)||Shear module (GPa)||Density (kg/m3)|
| Average CTE 20-300°C (µm/m°K)|| Specific heat capacity 50/100°C (J/kg°K)|| Thermal conductivity Ambient temperature (W/m°K)|| Electrical resistivityAmbient temperature (µΩm)|
|| 460 - 480
|| 40 - 45
|| 0.20 - 0.25
The information in this document is for illustrative purposes only. The data and examples are only general recommendations and not a warranty or a guarantee. The suitability of a product for a specific application can be confirmed only by Ovako once given the actual conditions.The purchaser of an Ovako product has the responsibility to ascertain and control the applicability of the products before using them. Continuous development may necessitate changes in technical data without notice. This document is only valid for Ovako material. Other material, covering the same international specifications, does not necessarily comply with the properties presented in this document.