John wrote:
>I use 75% argon / 25% co2. My Lincoln
>instruction manual recommends pure
>co2, no reason given. The welding shop
>guy says the blend runs cooler. I've been >satisfied, but am curious
about whether
>the co2 would be any different/better. My >guess is that the difference
is not critical. >I'd welcome any other opinions from the
>list on the matter. John Vallely
When I worked for the local Highway Department, 75% argon / 25% co2 was
the blend they used for all their welding - not just on the trucks, but
also on road signs, guard rails, etc. It seemed to be good for any
welding they did, although I'm afraid I can't tell you what reasons they
had for chosing that particular blend.
-NORY
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