[admin]

http://www.weldingtipsandtricks.com/er70s2-er70s6.html

Subtle differences between er70s2 and er70s6 for tig welding,
Jody

6QmO-LXJ1j0

[Markus]

Nice video, thanks once again!


Silicon acting with iron oxides??

er70-s2.png (360.08 KiB) Viewed 2531 times

er70-s6.png (355.82 KiB) Viewed 2531 times

S6 creates more fluid weld puddle and also have better wetting properties says Lincoln's website. Outside of the weld looks indeed quite bad compared to S2, but what about the inside of the weld? What if S6 brought all the impurities out from the weld instead of leaving those in the weld?
[Source: http://www.lincolnelectric.com/en-us/co ... nElectric)]



From Esab's handbook: [http://www.esabna.com/euweb/mig_handbook/592mig10_4.htm]
The best safeguard against this is to remove all oxide as soon before welding as possible.Although iron oxide (rust, mill scale) can be welded over in mild steel, an excessive amount can cause lackof fusion.



I'm just curious is there any difference between your welds, if those are cut and etched? Could we see it in future videos perhaps?

[admin]

Interesting points. If I can get around to a macro etch I'll make sure to post it.


Sent from my iPhone using Tapatalk

[Bobw]

Could you post some pictures of that back purging jig
and maybe some dimensions
and tips on how to build it
Again another great video

[MosquitoMoto]

Great video, thanks Jody.

Here in Australia S6 seems a little easier to find than S2 (in my limited experience) and is sometimes hailed as something of an improvement. Down at the arc, my own experience is that S2 generally gives a better behaved puddle and that S6 can give a 'fizzy' puddle as any crap in the steel comes up to the surface.

The performance of S6 when full penetration is achieved - as shown in the video - gave me pause for thought though.

Thanks again!



Kym

[Otto Nobedder]

I have challenges achieving "helium tight" with the s-2 rod versus the s-6 rod, and frankly, for non-structural applications I'll try 309 rod next.

Steve S