The chemical composition and mechanical properties of steel castings must comply with the relevant provisions of GB/T 40805-2021 “General Technical Conditions for Delivery and Acceptance of Steel Castings”. The mechanical properties of the electrode or wire used for repair welding of steel castings shall be at least equivalent to that of the base metal.
The welding shielding gas for steel castings shall comply with the provisions of ISO 14175:2008, and its type and composition ratio shall be clearly identified.
The oxygen used for welding and cutting steel castings shall comply with the provisions of Industrial Oxygen (GB/T 3863-2008).