American Welding Society Forum
can lamination occur in steel bar stock?
I have seen it in coil stock only .004" thick, didn't show up on either side, but split wide open when formed. This comes from a slag inclusion that gets rolled out and can run a great distance in the material.
I agree with Dave on slag inclusions. The story I got from one of my customers is that the problem can start with a cast ingot. Apparently, once the ingot has cooled, the top portion that includes a lot of slag is removed before the good stuff is rolled. If the "bad" stuff is not removed completely, the slag gets rolled and can cause delamination.
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