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  #1 (permalink)  
Old 06-05-2010, 04:15 PM
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Default Stainless welding - Oxy / Acetylene

Had another play with the Henrob torch yesterday having had it tucked in the shed for a while. Have some leave coming up soon so I thought I'd blow the bugs out ready for another push on the cobra build.

This time I thought I would try stainless steel welding, as the video says its a piece of cake. I am usually fairly sceptical when the video guy that has 20 years welding experience says it's easy, but, it wasn't too bad at all.



Basically once you have the flame set right, you just walk the weld pool along with no actual difference to mild steel.



They aren't the most beautiful looking welds but the penetration is good.

Anyways, back into it, thought there might be some interest. I'll post some more when I have a decent crack at the aluminium welding with the torch. I imagine that will be the tough one.

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Old 06-05-2010, 05:45 PM
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Very nice! I did not know you could weld Stainless with Oxy / Acetylene. Thank you for the Info.
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Old 06-05-2010, 07:50 PM
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Learning new stuff all the time. Thanks for posting that.
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Old 06-06-2010, 03:18 AM
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Quote:
Anyways, back into it, thought there might be some interest. I'll post some more when I have a decent crack at the aluminium welding with the torch. I imagine that will be the tough one.
Looks good.

Be interesting to see how it goes with Al. I would think the O2 would cause problems with the base metal oxidizing.

Stainless steel is beautiful to weld with. I sleaved my control arms with stainless pipe and welded stainless to mild with 316 rods. I was amazed how nice it worked.



The hard thing about welding pipe is going around corners. I got a few lumps were i stopped to roll over the arm (it was in a jig).

Only problem with stick welding stainless is you have to be careful not to inspect it before chipping off the flux. With stainless it actualy explodes and shoots off.
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Old 06-06-2010, 07:25 AM
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why would you 316 st stl over 309 st stl ,when welding a carbon steel to stainless.
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Old 06-06-2010, 08:06 AM
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Oxy welding aluminuim is an art. It's possible. All you have to do is master the colour of the puddle. When you can recognize the difference between molten aluminium and solid aluminium. (there's very little difference before the whole thing falls away) you can do a very nice job with gas. Make sure everything is super clean. On both sides of the weld. Inside and out. Plus the joints should be super tight.
My dad was an airframe fitter in the war he taught me when I was 16. I haven't gas welded aluminium for a while but when I do, it's a challenge and a real sense of achievement when the job is done. Have fun.
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Old 06-06-2010, 02:58 PM
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Quote:
why would you 316 st stl over 309 st stl ,when welding a carbon steel to stainless.
316 were the only rods available. Still fine for the combination, just a little more expensive than 304 or 309. I have a friend who runs a custom fabrication business. He uses the combination on boats quite often without any problems.
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