Do welding, welders must be applied to the material, the performance of welding equipment and welding materials used in the performance have to understand, and to make appropriate option, in order to ensure the quality of welding products. Usually based on the chemical composition of the steel, mechanical properties, crack resistance and other requirements, as well as the shape of welded structures, working conditions, the forces and welding equipment and other aspects. Comprehensive consideration, the need for welding rods and tests to determine the measures to be taken by the process, if necessary.

1, in accordance with the general strength of carbon steel welded steel grades to choose the appropriate electrode. At the same time according to the need to influence the weldability of steel, base metal component of the transition, welded structure size, shape, groove and the forces and so on, were considered. In the weld cooling rate is large, the strength increased, welded joints prone to cracking unfavorable circumstances, often the choice of electrode base material strength than the low level. After normalizing treatment, etc. In case of multi-layer welding or welding thick plate, we need to prevent the phenomenon of low weld strength.

2, the selection of the same strength level of acidic or alkaline electrode welding rod, depending on the structure and shape of the weldment (simple or complex), plate thickness (stiffness of the small or large), working conditions (static load or dynamic load) and steel crack resistance and so on. Usually it requires good ductility, high impact toughness, high temperature performance, strong crack resistance, use alkaline electrode. The DC power supply difficulties, the choice of AC and DC welding materials.

3, for the dissimilar weld joints of low carbon steel and low alloy steel between the selection and generally lower strength grades of steel corresponding welding materials.

4, for carbon steel welding, due to the higher carbon content of steel, increasing the tendency to weld cracking occurs, the choice of low-hydrogen electrodes or welding metal has good ductility and high toughness electrodes, and take preheat , slow cooling after welding process measures.

5, for welding steel, cast steel generally have a high carbon content, and the thickness of the large, complex shape, easy to weld cracking. Especially when the steel content of alloying elements are more even more prominent, so the welding should pay special attention. Generally use low-hydrogen electrodes, and to take appropriate preheat and welding technology and other measures.

6, when gravity welding rack welding low carbon and low alloy steel, the choice of gravity electrode.

7, on the conditions of use of special steels and welded construction, the choice of specific electrode.

8, various grades of welding current range listed for reference purposes only. As the preheated workpiece than the normal current is reduced by 5% to 15%; when DC AC smaller than about 10%; vertical welding and overhead welding 10% to 15% smaller than the current level of welding.

keywords: E6013 welding electrode