The chemical composition of the welding core during welding with welding rods will affect the quality of the weld.
The welding core is the metal core of the welding rod, and its chemical composition directly affects the composition and performance of the weld metal. In order to ensure the quality and performance of the weld, there are strict regulations on the content of each metal element in the welding core, especially the content of harmful impurities (such as sulfur, phosphorus, etc.), which should be strictly limited and better than the parent material. For example, the H08A welding rod contains S less than or equal to 0.03%, P less than or equal to 0.03%, and C less than or equal to 0.1%. These regulations are intended to ensure the quality of the weld. Therefore, the harmful elements in the welding core should be as few as possible to ensure that the strength, toughness and corrosion resistance of the weld meet the requirements.
In addition, the chemical composition of the welding core also directly affects the quality of the weld. The steel wire used as the welding rod core has its grade and composition separately specified to ensure that the quality and performance of the weld during welding meet the requirements.
For example: The welding core of the E6013 welding rod is a special steel for electric welding.
E6013 electrode is a carbon steel electrode with titanium oxide coating, suitable for welding low carbon steel structures. Its core diameter is 5.0mm, it is an acid electrode, and can be used for all-position welding. This electrode is suitable for thin plate small pieces and cap welding that requires beautiful and smooth weld surface. It has the characteristics of AC and DC dual use, and the welding current range is 180-230A. E6013 electrode shows good process performance during welding and is suitable for a variety of welding positions, including flat welding, vertical welding, horizontal welding and overhead welding, etc.