Shielding gas recommendation

[Unibit]

Noob question on shielding gas here, I have been welding for several years with C25 gas on a MM211 with good results. I recently picked up a MM252 and want to give spray a try for those occasions when I work with 3/8 + plate. I never had a need to change from C25 with the 211 however, like anything when you have the ability to do something, the need seems to arise more and more often. Question is, I have read that 90/10 and 98/2 both work with spray, could one of the two be considered a general use gas over the other that would produce good results on 16 guage up to 3/8 material? I already have an oxy rig, pure argon for tig, and C25. Would like to not add another bottle to my already limited space.

[H80N]

Noob question on shielding gas here, I have been welding for several years with C25 gas on a MM211 with good results. I recently picked up a MM252 and want to give spray a try for those occasions when I work with 3/8 + plate. I never had a need to change from C25 with the 211 however, like anything when you have the ability to do something, the need seems to arise more and more often. Question is, I have read that 90/10 and 98/2 both work with spray, could one of the two be considered a general use gas over the other that would produce good results on 16 guage up to 3/8 material? I already have an oxy rig, pure argon for tig, and C25. Would like to not add another bottle to my already limited space.

replace your C25 with 90/10.... it works for both short circuit and spray transfer

this manual explains a lot of the process and physics

http://www.awssection.org/uploads/longisland/files/Praxair_Shielding_Gas_Manual.pdf

[Unibit]

Thanks for the link, good info. If I understand the content correctly, the higher argon content will help stabilize the spray weld puddle while CO2 maitains arc integrity. Sounds like I may have trouble with keeping the puddle fluid on low amperage welds. I guess I am getting another bottle if I want to spray.