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Up Topic Welding Industry / Technical Discussions / shielding gas for SS
- - By ludmil_1 Date 07-13-2016 05:03
Hello Friends
I use a shielding gas M11(95%Ar 3%CO2 2%H2) DIN EN ISO 14175 for welding of stainless steel(series 300).What could be the reason for the formation of pores.Welding FW seams of pulse, thickness is 3 and 6 mm .Is it possible gas supplier is not properly mixed gases, or purity of gas is not the norm.
Parent - By WeldinFool (**) Date 07-13-2016 18:07
There are many things I would look into before blaming porosity on the shielding gas. Preparation of base metal being number one...
Parent - By jwright650 (*****) Date 07-13-2016 20:39
The only thing that I can think of (regarding the gas itself) ....would be the dew point that the gas supplier checked/tested/verified for....you could ask for a certification of the dew point of that gas mix from the gas supplier.
- - By ludmil_1 Date 07-14-2016 11:05
Preparation of base metal is perfect.When TIG welding is greats, if I use a shielding gas 98%Ar 2%CO2 it is good but is not good overflow.
Parent - By Don56 (**) Date 07-15-2016 19:31
If you are certain the problem is the gas, have you tried another bottle of the same blend?
Up Topic Welding Industry / Technical Discussions / shielding gas for SS

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