Hot straightening is a very common method to restore longitudinal beams for trailer chassis that have been distorted due to welding. It is not recommended to use hot straightening for Strenx and Docol AHSS. It is not recommended to use hot straightening for Strenx and Docol AHSS. This is because the steel may lose its guaranteed properties in the heated area.
The recommended maximum temperature these steels can be subjected to without loosing their guaranteed mechanical properties is:
Strenx 700 MC: 650 °C
Docol 1000 DP: 300 °C
Docol 1200 M: 200 °C