metal shrink?
metal shrink?
(OP)
we have a piece of 304SS that is 35 inches long and has a cross section of 1.5" x 5/8". This piece was originally bent with a max gap of 1/8" at the middle and was welded on to 3/8" plate with a tig weld on both sides. once it was on welded on it was ground to flat.
We had two holes one at each end going the long way (35"). once the above process was complete the holes were found to be 1/16"-1/8" short. The piece was straight the hole process so the short value is not a result of it bowing out.
Does it seem plausable that having a bent piece welding it and grinding it flat can shrink 1/16"-1/8"?
We had two holes one at each end going the long way (35"). once the above process was complete the holes were found to be 1/16"-1/8" short. The piece was straight the hole process so the short value is not a result of it bowing out.
Does it seem plausable that having a bent piece welding it and grinding it flat can shrink 1/16"-1/8"?





RE: metal shrink?
Can you load a sketch up I can't quite follow your post it doesn't make sense but I understand your worry over weld shrinkage.
You can estimate shrinkage of welds go to this site:-
h
It is possible to have the shrinkage you talk about but there are lots of factors.
desertfox
RE: metal shrink?
RE: metal shrink?
A rough rule of thumb for the contraction of a weld is about a (1mm/metre length of weld) so unless its bowed then I can't see the holes being 3mmm out.
One way round the problem is to put the holes in after welding.
desertfox
RE: metal shrink?