[TheForge] Shrinking Stainless Sheet metal

[James Binnion]

No,the high thermal expansion and the low thermal conductivity is  
what causes the warping and further heat just makes it worse in my  
experience.

Jim
On Jan 18, 2007, at 8:28 PM, Peter Fels And Phoebe Palmer wrote:

> Thanks James;
> Shouldn't those same properties make it easier to heat  
> shrink?...pete f
>
> James Binnion wrote:
>> Stainless has a 25% higher thermal expansion rate than mild steel.  
>> This is why it is such a pita to work when you are welding  it in  
>> thinner sections it will warp at the drop of a hat it is also a  
>> poor thermal conductor, much worse than mild so the heating is  
>> localized more than with the mild and the thermal expansion is  
>> acting on a smaller area resulting in greater warping.  If  
>> possible keep beads short and move to a different area to do next  
>> bead and keep working different areas around whole perimeter till  
>> the complete weld is done to keep from getting too much heat in  
>> one area. This will help but it is still likely to warp.
>> Jim
>> On Jan 17, 2007, at 1:38 PM, Ries Niemi wrote:
>>>
>>> Theoretically, it should move much like mild steel, but its so  
>>> damn hard to get to move, ever, that it seems to be harder to  
>>> heat shrink.
>>>
>>> ries
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