Durabor® 28MnB5
Durabor® 28MnB5 introduction
Quenchable boron steel represent a breakthrough in heat treatment technology. This steel uses boron as a hardening agent. The melting and refining process, together with thermomechanical treatment by controlled hot rolling, allow ArcelorMittal quenchable boron steel to attain a remarkable degree of hardness and a very uniform microstructure, resulting in excellent mechanical loading performance after heat treatment of the finished part.
Equivalent material: EN 28MnB5, AFNOR 28MnB5RR, DIN 28B2
Durabor® 28MnB5 chemical
| Property |
Value |
Comment |
| Aluminium |
Aluminium of 0.015 % |
min. |
| Boron |
Boron of 0.002 - 0.005 % |
- |
| Carbon |
Carbon of 0.26 - 0.3 % |
- |
| Manganese |
Manganese of 1.2 - 1.4 % |
- |
| Phosphorus |
Phosphorus of 0.02 % |
max. |
| Silicon |
Silicon of 0.2 - 0.3 % |
- |
| Sulfur |
Sulfur of 0.005 % |
max. |
| Titanium |
Titanium of 0.02 - 0.05 % |
- |
Durabor® 28MnB5 electrical
| Property |
- |
- |
| Application areas |
| Chemical composition |
| Delivery condtion |
| Heat Treatment |
| Other |
| Processing methods |
| Surface condition |
Durabor® 28MnB5 mechanical
| Property |
Value |
Comment |
| Elongation |
Elongation of 9 % |
Quenched | 6 mm specimen in the rolling direction |
| - |
Elongation of 26 % |
Delivery condition | 6 mm specimen in the rolling direction |
| Hardness, Rockwell C |
Hardness, Rockwell C of 49 [-] |
Quenched | 6 mm specimen in the rolling direction |
| Tensile strength |
Tensile strength of 620 MPa |
Delivery condition | 6 mm specimen in the rolling direction |
| - |
Tensile strength of 1650 MPa |
Quenched | 6 mm specimen in the rolling direction |
| Yield strength |
Yield strength of 420 MPa |
Delivery condition | 6 mm specimen in the rolling direction |
| - |
Yield strength of 1200 MPa |
Quenched | 6 mm specimen in the rolling direction |
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