On 2008-10-18, Curt Welch <curt@[EMAIL PROTECTED]
> wrote:
>> In any case, a couple of cl***** ago I had a great chance to
>> practice welding thick beveled plate with 7018, and I think that I
>> have a grip now as far as how to avoid entrapping slag.
>
> I would suspect that if you didn't get to do a bend test on it, it's
> probably not as good as you think it is - at least if it was thick
enough
> to require multiple p*****. I know it sure fooled me. The welds looked
> very strong and clean to me, but when you bend them, even a small amount
of
> trapped slag can cause it to break at the bend.
>
> Maybe with your experience you have mastered it, but like I said, is
sure
> fooled me.
>
Here are some pictures of beveled 3/4" plates welded with a multipass
weld,
that I did at school with 7018. I took the weldment home.
For the heck of it, I took it to a mill 5 minutes ago and milled a slot so
that I
could see how much slag I trapped. The result makes it a little hard
to tell, but I do not see much trapped slag -- but maybe I was not
looking hard enough.
http://igor.chudov.com/tmp/Multipass-Weld/
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