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Yes, it increases and decreases strength in traditionally steels. Depends on what steel you have and what you mean by "thin rods", and the weld process , and the specific weld parameters. Properly selected filler metal will be close to the base metal strength. Common stick electrodes are "60" which means the weld deposit will be over 60,...


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Regarding the problem you have, without reviewing the results its difficult to make a definitive answer. However, if you are observing high loads near the weld, I think you should try to make geometric modifications, to decrease any stress concentrations or loads. The reason is that welds are generally very "temperamental". What I mean by that is ...


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In general concave welds are avoided. Usually, they are the unintended product of vertical welds, when gravity is affecting the molten mass. However there are cases, where concave welds are beneficial for the fatigue strength. For example for bending stresses, AWS recommends the following improved profile for bending loads. Figure 1: AWS improved profile (...


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