From: djb@invalid.com   
      
   On 27/03/2025 07:47, Richard Smith wrote:   
   > MIG stainless - you have to "hot-up" the arc and give fluidity.  1% O2   
   > in Ar is the best economically achievable for MIG stainless.   
   > MIG stainless with 100%Ar is next-to-useless - no penetration and little   
   > fluidity (I have tried putting TIG gas (100%Ar) on a MIG welder with   
   > stainless wire - that is the limit of my experience).   
   > TIG is inherently penetrative - runs perfectly on 100%Ar, as you know.   
      
   I did the same with steel and MIG some years back when BOC were out of   
   Argoshield light and the guy thought it would be OK, 100% Ar not good,   
   fortunately the local depot got the Argoshield back in stock and swapped   
   the bottle FOC. I use the Argoshield light on stainless from time to   
   time and find it fine, IIRC 93/5/2 Ar/CO2,O2.   
      
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