EN 1.0503 Material C45 Steel Equivalent, Properties, …
ResultWelding. Since material 1.0503 has a medium carbon content, it needs to preheat before welding, and the C45 material preheating temperature is 150 to 250 °C. After welding, it's better subjected to stress relief immediately, especially for large thickness weldments, the tempering temperature for stress relief is 550-660 °C.