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Flux Core Welding Gases

MetalRecommended Shielding GasCommentsPart Number
Carbon SteelStarGold C-25Small and large diameter cored wire; short circuiting and globular transfer; good alloy retention; quiet arc; good bead profile; low smoke, fume, and spatterAR STAR14-T
Carbon SteelCarbon DioxideSmall and large diameter cored wire; short circuiting and globular transfer; wide penetration profile; higher fume and spatter levels;  greater loss of alloying elementsCD 20
Carbon SteelStarGold C-15Only for wires formulated to work in high argon content gas blends; spray like transfer; excellent alloy retention; quiet arc; good bead profile; low smoke, fume and spatter AR STAR10-T
Carbon SteelCO2Deep penetration and fast travel speeds but with higher burnthrough potential and more spatter; high current mechanized weldingCD 20
Stainless Steel StarGold C-25Small diameter cored wire; spray transfer;  good bead profile; little smoke and spatter;  low fume;  clean weldsAR STAR14-T
Stainless Steel Carbon DioxideShort circuiting and globular transfer; increased penetration, higher fume levelsCD 20
Aluminum Not Recommended 
Nickel and Cu/Ni Alloys Not Recommended