Ovako 831 is a through hardening bearing steel that is mainly used for medium sized martensitic hardened bearing components, but it can also be used for machine components that require high tensile strength and high hardness. Ovako 831 has a controlled Ni and Mo content for enhanced and consistent hardenability.
831B - Bearing quality (BQ) variant
- Through hardenability corresponding to a ring with approximately 20mm wall thickness (~Ø35mm bar)
- Can be induction or flame hardened
- Good machinability in soft annealed condition
- Very good dimensional stability
BQ-steel® is a bearing quality clean steel optimized for fatigue strength and is also ideal for new design solutions outside the bearing industry.
ASTM A485 grade 1/B2
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.