davidjohnperry
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No I'll look in to that @TechnicAl your a welding consumables legend
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mtt.tr
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What causes that?
Nitrogen basically.......the first pass absorbs the atmospheric nitrogen into solution.....the heat of the second pass transforms some of the nitrides from globular shapes to angular shapes (which become stress raisers)...thus embrittling the fist pass...the heat of the second pass (third layer) exaggerates this and the weld becomes too brittle. The literatures says max weld thickness of 10mm which is what you would expect from 3 layers....but really its the 3 layers thats the issue.
What you have to know is that self shielded is really a misnomer......gasless is better description.....they dont provide an effective shield as such....the weld metal can cope with atmospheric ingress and remain ductile....Nitrogen levels in Innershield welds can be 20x higher than say a 7018 weld but theres no porosity and the ductility is acceptable.
davidjohnperry
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@TechnicAl is a legend I kinda understand what you mean I'll play with it when I get some time I'll post my findings. @TechnicAl you have any rough voltage and wire feed settings
mtt.tr
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Very interesting, i wont pretend to know it.
but that is knowledge that can be worked with much appreciated
https://www.lincolnelectric.com/ass...rshield-InnershieldNR-211-MP/nr211mpe-eng.pdf
The voltages are lower than you would expect
davidjohnperry
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That's interesting that the 1.1 wire is Max 17 volts for max thickness of 12 mm
@TechnicAl just like David says you are indeed a legend.
Found that link there, it's from an American welding forum.
David the info blaster gives about nr232 is invaluable.
https://app.aws.org/forum/topic_show.pl?pid=54214%253bhl%253dnr-232
Found that link there, it's from an American welding forum.
David the info blaster gives about nr232 is invaluable.
https://app.aws.org/forum/topic_show.pl?pid=54214%253bhl%253dnr-232
davidjohnperry
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Wow that is some great information
Hope some will find it useful.
I read it well after I had started using fluxcore. But I definitely took some good info from it.
It's not only the knowledge blaster shared but the thought, skill and time that was used to write in such an informative and easy to read manner that impressed me.
I read it well after I had started using fluxcore. But I definitely took some good info from it.
It's not only the knowledge blaster shared but the thought, skill and time that was used to write in such an informative and easy to read manner that impressed me.
davidjohnperry
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Gas shielded flux core is great dont get me wrong that stuff Is amazing but I'm always looking for new things to try for efficiency
Yes, Its very good.....They use Innershield a lot more over in the US than we do in Europe so the welders over there obviously have much more experience......I saw he was using 0.072".......take care because it also available in 0.068" only 4 thou smaller but its a different flux fill.....the 0.068" is better for downhand whilst the slightly bigger 0.072" is better for positional. The NR233 is considered to be much easier to get used to especially 1.6mm
Quick question about the esab coreshield wire.. There is a large 15kg size roll of coreshield 0.8mm which will be really handy when welding galvanised thin sheet steel.. But can anyone confirm that it feeds nicely on the normal 0.8mm rollers? Because i saw somewere that the rollers that do solid wire can also handle coreshield flux wire.. is this true?
davidjohnperry
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If I remember correctly you should run knurlard rollers because this wire its soft so you need something to grip the wire solid wire rollers can be used but you have more likely of crushing the wire and causing feeding issues
gordon stephenson
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Just a daft idea!! Could ally U shaped rollers be used? Particularly on a four driven roll feeder, Giving all round contact with the wire bot not crushing it.
Munkul
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If you have a good quality 4 roller feed, you should be able to feed smoothly with practically no pressure, so V or U rollers will work fine 
Better with all driven rolls with V or U, than flat faced idlers as some feeders have. In fact, I'm not sure how well it would work with flat faced idlers at all.
Better with all driven rolls with V or U, than flat faced idlers as some feeders have. In fact, I'm not sure how well it would work with flat faced idlers at all.I know that mate which is why im askin. Im asking about the esab coreshield wire and if anyone who uses it has used the solid rollers because as i already mentioned it DOES say you can run it on the solid rollers but i would like someone who uses it to confirm )
it all depends on the wire feeder.......if you use knurled rolls it will run on poorer quality wire feeders
