Doing some Stainless Tig, sched. 40, guy I work with says to immediately put the welded piece in the water, I'm a bit skeptical. I have heard differing opinions, I'd like some hard facts, If you know please enlighten me.

Thanks

D.

 

Don't quench anything structural, I'm 98% sure when you quench somthing right after your done it weakens the weld and promotes cracking. All my teachers have told me don't quench...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackwagon &raquo;</TD></TR><TR><TD CLASS="quote">Don't quench anything structural, I'm 98% sure when you quench somthing right after your done it weakens the weld and promotes cracking. All my teachers have told me don't quench...</TD></TR></TABLE>

ive heard the exact same, and i weld 304 stainless, sched 40 and i never quench it.

 

DO NOT QUENCH ANYTHING AFTER WELDING!!!! Let it cool at room temp.

 

I would have to agree with the above; However, quench only if you absolutely have to. Such as to prevent any warping from heat imput or to try and shrink the metal or to prevent paint burn off, but again if its supports something important dont quench.

 

only quench in class, use temp sticks and dont let it get to hot or it will warp, and your all fucked up

 

nooooooooooooooooooo dont do it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackwagon &raquo;</TD></TR><TR><TD CLASS="quote">Don't quench anything structural, I'm 98% sure when you quench somthing right after your done it weakens the weld and promotes cracking. All my teachers have told me don't quench...</TD></TR></TABLE>

does wyotech still have the sign on the water fountain in the shop that says no quenching?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackwagon &raquo;</TD></TR><TR><TD CLASS="quote">Don't quench anything structural, I'm 98% sure when you quench somthing right after your done it weakens the weld and promotes cracking. All my teachers have told me don't quench...</TD></TR></TABLE>

Quenching = Harder (especially right where the weld is..)
Harder = --&gt; Brittle &lt;-- stailess likes to grow so thats bad.

someone correct me if i'm wrong.

 

No your right when you quelch it it cause thoughsand of little cracks in the crystaline structure of the metal which cause it to become hards for it to flex= hard, but it makes the metal more brittle

 

Thanks for the replies guys. I was talking to my "tester" today, he works for the T.S.S.A. which in Canada is the Technical safety and stadards association. He's an oriental fella that's been trained by the British in welding and he sure as hell seems to know his stuff. I was doing my 45 degree in position stainless sched 40 tig root, tig cap weld. After I was done welding, he said to quench it. Now this piece goes to a lab for destruction tests meaning it will be bent until it breaks. So now I'm perplexed, I tend to agree that stuff shouldn't be quenched, but if he says do it, that confuses me. Maybe I'll go "Ask Andy" on the Miller site and see what he says. The funny thing is I do roll-cages and fabrication at home in my spare time and would never in a million years quench those welds.

Thanks

D.

 

it all depends on what your trying to achieve, quelching is great for tempering. like swords and hammers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pulp Fiction &raquo;</TD></TR><TR><TD CLASS="quote">

does wyotech still have the sign on the water fountain in the shop that says no quenching?</TD></TR></TABLE>

nope not at the pa campus anyways...

 

Where I worked they've been welding stainless structurally for God knows how long. They do quench in water when welding, but ONLY stainless, never mild steel or any alloy. The material was 304 stainless.