Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [welding]

Use this tag when the question deals with the process of making a weld. For questions about weld design or the use of welds, use the [welds].

Welding is the process of physically combining two pieces together. This is usually accomplished by melting the components, but can also be done mechanically in the friction stir process.

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What treatment is necessary after welding carbon steel pipes?

When welding stainless steel pipes, the welds need some treatment (e.g. ball blasting and pickling). Is there anything equivalent for carbon steel (not stainless)? I'm looking at a tender document where someone specified pickling etc. for C-steel…
mart
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Division symbol in welding proceedure

I am dealing with a European contractor, and often I see a division symbol (÷) in their documents, screenshot below. Could somebody explain what that means? P.S. Hope this is the right stack for it. If not, kindly suggest where to post it…
Jek
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Thoriated tungsten TIG electrodes were in use 45 years ago.What were their specific use and problems?

Some TIG electrodes in use in the early 1970's were marked Thoriated Tungsten and Non-Thoriated Tungsten. What were the specific purposes or properties for these TIG welding electrodes?
user416
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Brazing Zinc-Aluminum Alloy to Steel

I have an electrical connector made of zinc-aluminum alloy (exact mixture unknown) that I would like to braze to a steel tube. Can this be done, what kind of material(s) would work for this application?
William Hird
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Does slag in case of overhead weld form a layer inside the molten metal pool?

In the case of horizontal weld, the slag covers the fresh molten melt because it has a lower density and forms a protective layer which prevents molten metal to come in contact with atmospheric gases. But, In Overhead welding as the slag has a lower…
Meeran Qari
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What kind of welding technology is used for welding this muffler?

Here is an image of a muffler of an R/C aircraft engine. It's made of aluminium alloys. What do you think about the welding technology which is used to make this muffler? I can't see any welding bead.
Roh
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Is Lift-tig welding the same as lift-arc welding?

I am a completely new not-even-started starter in welding. I would like to know is Lift-tig welding the same as Lift-arc welding? If not, what are the differences?
Franva
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How effective are welding blankets?

I am a novice welder (D.I.Y). I need to weld in a very sensitive area. It will be surrounded by PVC and other plastics withing about 30-50cm of where I have to weld. I have an inverter arc welder, and I am worried about spatter etc when welding in…
Louis van Tonder
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What are the benefits of a digitally controlled TIG welder?

There are "analog" TIG welders where the parameters are directly controlled by rotary knobs and buttons. For example this one. Then there are "digital" ones where parameters are controlled by one rotary encoder and several buttons. Link this…
Pibben
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200A tig welder enough to weld 8mm thick steel flat bar/stainless steel sheet/tubing

I would like a tig welder. It has to be able to weld 8mm thick steel flat bar so we can fix the front gate if it breaks. I also want to be able to do stainless and aluminium for projects. It seems my budget can only get me at most a 200A machine..…
Ageis
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Stick welding inner corner

I'm having trouble welding the inner corners of my material. Welding material is sometimes deposited on either one side or both sides, but never really connecting the two parts. Side/flat welds work fine: But those pesky inner corners don't: The…
Gelunox
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What settings to set to weld aluminum with TIG?

I bought a Everlast 205 AC/DC and I am new to welding. I would like to experiment with aluminum welding but my electrode doesn't last very long. The arc-cone is pretty wide and I cannot establish a nice weld pot and I don't understand why. My…
nowox
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Welding Aluminum to Medium Carbon Steel

I have a table flat surface made from aluminum, and the table legs are made from medium carbon steel. What are 3 welding processes that could be used to weld the legs to the flat surface.
Rayan Akiki
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