For welding 316L stainless steel plates, what brand of welding electrode should be used?
Thread Content
This post was last edited by zhaoqingsheng on 2012-4-10 14:28. Question: For welding 316L stainless steel plates, what brand of welding electrode should be used? If TIG welding is used, what grade of welding wire should be used? Additionally, for 316L steel plates 4–5 mm thick, is it necessary to first create bevels, then perform TIG welding for the root pass, before proceeding with weld welding for the cover pass?
For welding 316L stainless steel plates, use welding electrodes of type E316L and grade A022; when TIG welding is used, weld wire of grade H03Cr19Ni12Mo2 should be employed. For 316L steel plates 4–5 mm thick, root welding can be performed using TIG welding with a 2–3 mm gap without grooving on the back side, while the top layer is welded using arc welding after creating a 60–70 degree V-groove on the front side.
This post was last edited by zhaoqingsheng on 2012-4-11 09:28. Great, thank you so much! One more question: Is it permissible to use A302 welding electrodes to weld 316L stainless steel plates? Thank you again!
Thank you for the extra points. When welding 316L stainless steel, welding rods of grade A302 should not be used. A302 welding rods are designed for welding austenitic stainless steels with high-strength low-alloy steels; in other words, they are suitable for welding dissimilar metals such as 304 or 316 with metals like 10, 20, Q245R, etc. Since the material used for flues is 316L stainless steel – an ultra-low carbon austenitic stainless steel – and given that flues are likely to be subject to significant corrosion, using A302 welding rods may result in welds that have adequate strength, but poor corrosion resistance. Specific evidence can be found in any welding rod selection manual; if that’s not possible, the construction party can refer to the \"Code for Welding of Pressure Vessels\".
Thank you for your repeated guidance! I’ll look for more relevant materials to learn further*. Thank you again............................................................
I just searched online again; the grade for welding wire/electrodes should be: H00Cr19Ni12Mo2/A022
It’s been almost two years since I posted this; going back and reviewing it again makes me feel like I’ve gained even more from it! Isn’t it delightful to learn and practice from time to time?