[PSUBS-MAILIST] Fw:

[Daniel Lance via Personal_Submersibles]

Hank,
Repeat the process and this time do a " side " bend on your coupon .
Dan Lance
On Aug 19, 2015 3:32 PM, "hank pronk via Personal_Submersibles" <
personal_submersibles at psubs.org> wrote:

> Today I continued testing my welds and did a typical coupon test.  This is
> .375 thick material welded with a mig welder in two passes.  I preheated
> the steel to 300 degrees, then let it cool to 300 degrees F for the second
> pass.  The bend test was a complete success.  I also welded three .75 in
> thick plates together into a big C shape so that a 20 ton jack would fit
> inside.  I welded a strong back on to prevent bending.  I welded with the
> same procedure but three  fillet passes on each side.  I tried to break it
> with the 20 ton jack and maxed the jack out and no breaks or cracks.   It
> seems to me, if you preheat your metal then mig welding works fine.
> I will try to find the ASME rule for preheating temperature of the first
> and second pass before I do any welding on my sphere.
> Hank
> by the way, I did this coupon test after a root canal this morning. :-)
>
>
> On Wednesday, August 19, 2015 1:15 PM, xxx xxxxx <mp13 at live.ca> wrote:
>
>
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