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Does it need heat treatment after welding?
According to the article they achieved about 70% strength in the HAZ without post-weld heat treat, and full strength after heat treat. For comparison, a bad 6061 weld might be as low as 20% strength without post-weld heat treat, but it might recover to over 50% if it comes from China by ship :)
gbj_tester
Does it need heat treatment after welding? Cheap 6061 frames which haven't been retreated after welding tend to fail in the area affected by the heat of welding.