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David bijo
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Join Date: Mar 2010
Posts: 2

Weld Crack in SS 316L Sheet

03/17/2010 6:54 AM

Dear,

I made a potable water tank with S.S 316L 3mm sheet.In that some are getting crack on its belly position exactly on its heat zone(Just above the welding)I used 316l electrode and I feel that my procedure is correct and same as earlier.How it si happening?.Any material problem or welding error?Kindly Advise?
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welderman
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Hobbies - DIY Welding - New Member

Join Date: Sep 2007
Posts: 1601
Good Answers: 58
#1

Re: Weld Crack in SS 316L Sheet

03/18/2010 8:56 AM

If you have observed all metallurgical precautions (and it sounds like you have), and are still getting cracks, I suggest preheating the weld area. This will reduce the stress during cooling.
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ferrousfab
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Hobbies - DIY Welding - New Member

Join Date: Sep 2009
Location: Wisconsin
Posts: 28
Good Answers: 3
#2

Re: Weld Crack in SS 316L Sheet

03/18/2010 3:39 PM

What welding process are you using, and have you confirmed the grade of your stainless steel and filler metal? At time we have ran into problems such as yours, and investigations normally find that we have overlooked something. The last problem we had with stainless had to do with the so called same grade from 2 different suppliers. It turns out that it was not a mis-labled item, one was just of poorer quality.
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welderman
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#3

Re: Weld Crack in SS 316L Sheet

03/18/2010 11:09 PM

You might also try filling the tank with shielding gas while welding.
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