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Old 04-04-2005, 12:32 PM
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I there what you all guys think about this weld?
It's a replacement catalysator pipe tha I've welded for a friend's car, the flange(I'm not sure if this the correct name for that) was made by a another guy who works has a machinist.
The pipe was welded in the flange by me, it's all made of regular steel(I haven't used exhaust pipe) it looks so clean and shine because I hadn't nothing more to do so I spend two hours sanding it with 800 grit wet sand paper and cleaning the weld with a wirebrush.
I forget to mension it was all stick welded.

Sorry for my bad english.

António Costa from Portugal
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Old 04-04-2005, 05:44 PM
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“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

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Old 04-04-2005, 06:14 PM
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it looks like an excellent weld. only question is if you look close you can see little round metal balls on it, i've seen these before and have always referred to it as "flak" (i have a burn from that stuff- burnt through my suit, shirt, and onto my skin once. that was back in welding class).
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Old 04-04-2005, 07:52 PM
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I have been teaching welding for about thirty years and from what I see here you do not have the amps set high enough for the thickness of the metals you are welding. I would have you raise your amps setting about 20 or 30 amps higher than what you used on this weld. If you look at the edges of the welds they do not "flow" into the base metals. There is a tiny space between them. The weld needs to "wet out" and blend into the base metals without having to sand or grind them smooth. The little "balls" are called spatter and all stick welds do this. The spatter burns people and clothes but does not stick to the metal. Give them a tap with a chipping hammer and they will come right off. It is a GREAT start! Keep the Pictures coming! I can sipher anything so don't worry about your English.
Have Fun
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Old 04-05-2005, 01:29 PM
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yep, too cold. Learning curve is tough, you'll get it-

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Old 04-05-2005, 01:52 PM
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I agree with all you about the amperage being to low but the welder was at 140amps wich is it's maximum. The welder isn't mine, but it's one of the cheapos bought at a supermarket. It's 140 amps unit but I think that the 140 amps that it claims aren't real....
In my previous post I forget to mention that the pipe wall-thickness is 1mm and the flange thickness is 9mm.
Because the pipe wall is thin I welded vertical against the flange to avoid burning through the pipe wall.
The tiny space between them could be because this was the second weld bead, this bead was welded on the topo of the previous bead. I know that it isn't the correct way of doing it but....
The electrode thickness is 2mm, it is E6013 electrode. I usually use 6011 electrodes with my 225amp stick welder.
But I was welding with a friends welder and a friends electrodes.....
Thank you for your good advices, I know that I will learn a lot in this bulletin.

António Costa
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Old 04-05-2005, 05:47 PM
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Way better than my welding that's for sure

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