MinnesotaDave wrote:Best intro video into warping, in my opinion, is "Mr. Shrink"

http://youtu.be/2vuGlcbDwKY

Enjoyed the video. Agree with you, probably the best description of shrinkage I have ever seen. Always nice to see the theory behind the practice.

At what stage do you take out the wire? I guess seeing as you have to unclamp only when it's all room temperature again? I mildly warped some 10mm mild steel plate doing something similar on the weekend even though I was careful, slow, stepping around and clamped it hard to some straight heavy squa...

Some pictures pre-stressing the plate, weld and finished result showing lack of distortion. http://i1291.photobucket.com/albums/b550/27brad72/weld3_zpsd46421c8.jpg http://i1291.photobucket.com/albums/b550/27brad72/weld2_zps402e47de.jpg http://i1291.photobucket.com/albums/b550/27brad72/weld4_zps3f54d...

Thanks Mick. I pre-stressed the job using some 1.6mm wire underneath the weld zone and clamping either side. Hit it with 170 amps, let it air cool and it came out pretty much dead flat in all directions.

thanks again.

Hi All. This is my first post here so hi to you all and thanks for any advice you can give me. I am welding some 5/8" x 1.5" flat bar at right angles to a plate of 8" wide 5/16" thick stainless as per the pictures below (please ignore the undercut in the test piece). I have done ...