Selection of flux for submerged arc welding of Q345R and S30408

It is not recommended to use HJ260 flux for welding Q345R and S30408. These two materials are low-alloy steel and stainless steel respectively, and specific types of welding fluxes are required during welding to accommodate their chemical compositions and heat treatment properties. HJ260 flux is primarily used for welding carbon steel and low-alloy steel, and it may not meet the specific requirements of stainless steel welding, such as preventing corrosion in the weld area. It is recommended to use fluxes designed specifically for welding stainless steel or dissimilar steels; for example, fluxes containing high levels of nickel can better match the properties of the two materials, ensuring the quality of the weld and its corrosion resistance. You can consult professional welding material suppliers for specific product recommendations. .

HJ260 is a flux for stainless steel

Sorry, the previous information was incorrect. If HJ260 is a flux designed specifically for stainless steel, it can be used for welding S30408; however, since Q345R is a low-alloy steel, it is generally recommended to use a special flux that can accommodate the chemical compositions of both materials as well as their welding characteristics. For welding dissimilar steels such as Q345R and S30408, it is recommended to use composite fluxes that can handle various base materials, such as nickel-based or high-chromium-nickel-containing fluxes. These types of fluxes are more suitable for welding different materials together, especially when taking into account differences in thermal expansion coefficients and corrosion resistance. Please further confirm the specific model and properties of the flux to ensure it is suitable for welding these two materials. .

Submerged arc welding of dissimilar steels is rarely used.