Grade SB21M10B is a boron steel for general purposes without any specified mechanical properties. Its closest equivalent is found in the EN 10263-4:2001 grade 20MnB4 but with a difference in boron and manganese content. SB21M10B is suitable for use in pegs, chains, simple wear parts and machinery parts as cogwheels and axles in dimensions up to Ø30 mm or equivalent thickness.
SB21M10B - 20MnB4-3, 20MnB5
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.