CR70 S-3 is recommended for welding on what type of steel?

CR70 S-3 is specifically formulated for use on clean steel, which generally refers to steel that has been properly prepared for welding and is free from oxidation, rust, oil, paint, or any contaminants that could affect the quality of the weld. This type of electrode is designed to provide a smooth and stable arc, resulting in high-quality welds with good mechanical properties when applied to clean surfaces.

Using the electrode on clean steel ensures the best performance and adherence to the Structural Welding Code – Steel, which emphasizes the importance of surface preparation. Properly prepared surfaces prevent the introduction of defects or inconsistencies in the weld and help achieve optimal strength and ductility in the welded joint. This is why CR70 S-3 is not suitable for materials that are rusty, contaminated, or consist of low alloy steels where different welding techniques and electrodes might be necessary to accommodate those conditions effectively.