For S31008+Q345R welding, is ER310 better or ER309L?
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For S31008+Q345R welding, should ER309L, which is a weld material suitable for dissimilar steels, be used, or is ER310, the weld material specific to 31008, a better choice? Could any experts clarify this?
When welding S31008 (a type of stainless steel equivalent to 304 stainless steel) and Q345R (a low-alloy steel), ER309L is usually the better choice, as it is designed for welding dissimilar steels and can better handle the differences in thermal expansion coefficients and chemical compositions between various materials, thereby preventing cracks in the welds. ER310 is a high-chromium-nickel alloy welding material suitable for welding the same or similar steel grades; it is not designed specifically for welding dissimilar materials. Therefore, choosing ER309L is more suitable for welding between S31008 and Q345R. .
This is standard dissimilar steel; the default welding material selection is: for design temperatures not exceeding 315°C, use welding material 309. . Above this temperature, choose NiCrFe-2, NiCrFe-3, or NiCrMo-3
This post was last edited by wanlirn on 2024-1-15 at 12:38. When welding stainless steel and carbon steel, the alloy content in the electrodes used must be higher than that of the base material; ER309L certainly won’t work. At the very least, 310L is required
What about welding? Can the welding parameters be based on those for ordinary 304 and Q345R dissimilar steels?