Great video - shielding gasses

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You can't find a better example than this[ame]http://www.youtube.com/watch?v=lbT3xR6t6xg[/ame]
Reply:I'n no MIG meister. Can someone explain why they were using any gas for FCAW?I was under the impression that flux-core was intended to be used without shielding gas.Rex
Reply:t9 wire is a dual shield wire.
Reply:is t9 mandatory dual sheild.. will it weld fine with out the added shielding gas?
Reply:Originally Posted by rode2rouenI'n no MIG meister. Can someone explain why they were using any gas for FCAW?I was under the impression that flux-core was intended to be used without shielding gas.Rex
Reply:Originally Posted by weldrwomnOnly self-shielded Flux cored wire is meant to be used without gas.  Manufacturers also make gas shielded flux cored wires that are meant to be used with a variety of shielding gasses.
Reply:t9 wire will look like honeycomb or pumice if there is no gas.
Reply:i wish they would have done penetration samples along with that. i always loved straight co2 for doing FCAW stringers when i was putting SAW over them
Reply:Video no longer available.Gordie -- "I believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant."
Reply:Still works for me, try reloading
Reply:The video says "We are sorry but this video is no longer available".  Clicked on some others that scroll across the bottom.  Most of them work but some say unavailable too.Dunno but maybe the format is not supported by my Slackware Linux but I'm not curious enough to start messing with things right now.Gordie -- "I believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant."
Reply:The only little problem with changing gas is that it will change the physical characteristics of the weld metal.  Most wire packaging will give different impact strengths and ductility values between carbon dioxide and CO2/argon mixes.  Recently I notice more attention is being given to impact strengths especially with seismic structural codes.  We have been giving this more attention in colder climates for many years.   Bottom line is.. results may vary.