23NiCrMo15-5* is a case hardening steel with a high hardenability also suitable for Q&T. It is well suited for demanding
applications where high strength and high toughness is required.
• High hardenability
• Excellent toughness
• High wear resistance as carburized
• Delivered as rolled, normalized or annealed.
256A With a reduced controlled sulphur content to reduce the number of sulphide inclusions but ensure consistent machinability (BQ)
256G With a controlled sulphur content to ensure consistent machinability
* Designation followed by "*" is not an official EN standard grade but named according to the rules in EN 10027.
BQ-Steel® is a bearing quality clean steel optimized for fatigue strength and is also ideal for new design solutions outside the bearing industry.
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.