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  1. sbrunette

    Proper pre & post heat for welding 4140 annealed

    Hello, I am having a hard time finding out the proper technique of welding 4140 in the annealed state to a A500B structural tube. The 4140 shaft (2.375" dia.) runs through the tubing center (4.5" outer dia-with a 2.5" center dia.) the 4140 shaft sticks out either side of the tubing, a 5/8" weld...

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