[nickn372]

What gas do you use when you run flux cored gas shielded wire? Will regular 75-25 work?

[delraydella]

You shouldn't need any gas with a flux cored wire. The flux takes the place of the gas.

[weldin mike 27]

Hey,

There are certain kinds of flux cored wire that are designed for use with a shielding gas. It should be set out in the tech notes of the wire. Eg I belive that Lincoln E712 C is speced for Co2. Try to use with out gas and youll get porosity same as solid wire.

Mick

[delraydella]

Never knew that. I guess you do learn something new every day.

[Otto Nobedder]

Most "dual shield" wires, meaning flux-core with gas, call for 75/25. Mild steel wires will usually work OK with 100% CO2, though in my experience the 75/25 will give better results, such as less spatter and better bead appearance. Stainless wires are not so forgiving. The wrong gas wil make it nearly impossible to weld in anything but the flat position.

Steve

[nickn372]

Thanks a lot! I guess I will have to inquire with Lincoln on which gas is required. I was wanting to use Ultracore FCP309L all position for disimilar metals.

[Citroën]

Thanks a lot! I guess I will have to inquire with Lincoln on which gas is required. I was wanting to use Ultracore FCP309L all position for disimilar metals.

Take a look at the TDS;
http://www.lincolnelectric.com/assets/e ... L/c652.pdf

SHIELDING GAS
100% CO2
75% Argon / 25% CO2

[nickn372]

I did find that then. Thanks guys.