Applicable welding materials for carbon steel electrodes

Carbon steel electrodes are suitable for welding a variety of steels. The following is a detailed introduction:

Carbon steel
Low carbon steel
For low carbon steels such as Q235, 09MnV, 09Mn2, etc., J422 titanium calcium type carbon steel electrodes are a more suitable choice. It can be used for both AC and DC, can be used for all-position welding, has excellent welding process performance and good mechanical properties, stable arc, small spatter, easy slag removal, easy arc re-ignition, beautiful weld formation, can easily achieve welding of different widths and thicknesses, and has high efficiency. In addition, acidic electrodes such as J422 are also commonly used for welding low carbon steels such as 20# steel and Q235 steel, with good welding performance.

Medium carbon steel
Medium carbon steels such as 35# steel and 45# steel can be welded using basic carbon steel electrodes such as J507.

Low alloy steel
Low alloy steel is a steel with one or more alloying elements added to improve performance on the basis of carbon steel. When the total amount of alloy is less than 5%, it is called low alloy steel. Carbon steel electrodes are suitable for welding low-alloy steel with lower strength grades. For example, J426 carbon steel electrodes with low hydrogen potassium coating have excellent mechanical properties and crack resistance, good low-temperature impact toughness, and can be used to weld important and low-alloy steel structures, such as shipbuilding, bridges, pressure vessels, etc.; J427 carbon steel electrodes with low hydrogen sodium coating can be used for all-position welding, and are often used for welding important compressive loads or low-carbon steel thick plate structures and low-alloy steel structures, such as machinery, shipbuilding, bridges, etc.

Special case: welding with stainless steel
Although it is generally not recommended to use carbon steel electrodes to weld stainless steel and carbon steel, in actual applications, if welding is required, it usually belongs to the welding of dissimilar steels. Generally speaking, it is recommended to use stainless steel electrodes for welding carbon steel and stainless steel, such as A302 electrodes for welding 304 stainless steel and carbon steel, A312 electrodes for welding 316 stainless steel and carbon steel, A062 electrodes for welding 304L stainless steel and carbon steel, and A042 electrodes for welding 316L stainless steel and carbon steel. This is because carburization reaction will occur when stainless steel and carbon steel come into contact, and stainless steel will become brittle. When used in low-cold environments or high-pressure conditions, leakage and explosion accidents are likely to occur, so caution is required.