flux core wire with Co2 shielding gas?

[kibodwin]

I have tried to find an answer to this but am unable to word it correctly

I have my mig setup with flux core 0.8mm feeder wire and am looking at getting Co2 gas.
Is it ok for me to continue to use the flux cored wire with the Co2 gas and use it up (I am about 1/2 way through the spool) before getting the non-fluxed core feeder wire
Also for the feeder wire, does it need to be of the same material as the metal being welded?
ie, if I am welding stainless steel does the feeder wire also need to be stainless steel? Can I not use one type of filler wire for all types of steel I wish to weld?
Thanks for any pointers,
K.

 

[mowersman]

I have tried to find an answer to this but am unable to word it correctly

Is it ok for me to continue to use the flux cored wire with the Co2 gas and use it up (I am about 1/2 way through the spool) before getting the non-fluxed core feeder wire.

No. You'll just be using Co2 unnecessarily, also the wire is not designed to be used with shielding gas, so it may affect the composition of the weld. I would just advise dumping the gasless, welding with gas is far far better. I learned with gasless and really struggled, until a friend lent me a bottle of co2 for the weekend.
Andrew

 

[kibodwin]

thanks for that, I sort of assumed as much about wasting the gas...
I will go get some normal wire and use the gas, the flux cored stuff can always be used
some other time.

 

[rtbcomp]

I'd keep the cored wire somewhere warm and dry, it will come in handy if you run out of wire halfway through a job.

 

[kibodwin]

I planned on doing just that with it, no point in wasting perfectly good wire...
=)