I guess I should have clarified a couple things. This is a test joint of same thickness material. Not restrained in anyway. 110% certain this is 7005. We have these formed tubes custom made for us, and weld 100’s of these frames. We artificially age (heat treat) this material after welding to get th...

Im welding bicycle frames and get some cracking at the toe of the weld from time to time on the thin wall tube side. Seems like it only comes up from time to time. Crack forms immediately after weld is performed. Am I just cooking the thin wall tube? Im dabbing and forming the puddle about every sec...