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10-15-2015, 04:22 PM | #41 | |
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Re: Welding in Patch Panels on a Cowl
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10-15-2015, 04:47 PM | #42 |
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Re: Welding in Patch Panels on a Cowl
My best answer! I don't know! In the three or four welding shops I worked in, I can't ever recall anyone using helium($$$) or straight Argon. The only thing I ever saw used was the75% CO2 and 25% argon, for MIG or TIG. Actually, since it's merely shielding the welding from oxygen, I don't what part the argon plays. Likewise, in the low Hydrogen wires like 7018, 8018, etc, the flux creates a shield to keep hydrogen out of the weld. Hope this helps!
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10-15-2015, 05:14 PM | #43 |
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Re: Welding in Patch Panels on a Cowl
Strange that here in OZ, our MiG gas composition is the other way around.
For thin metal, we have 3.1 % oxygen, 5 % CO2, rest is argon. For a bit thicker plate, it is 20 % CO2 and 80 % argon. These are BOC specs. I seem to remember our general MiG gas was something like 90 % argon and 10 % CO2. I wonder why USA is so much higher in CO2 ? |
10-15-2015, 05:30 PM | #44 | |
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Re: Welding in Patch Panels on a Cowl
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10-15-2015, 06:24 PM | #45 |
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Re: Welding in Patch Panels on a Cowl
Argon must be much harder to get out of the air.
It is in abundance compared to CO2. 23.8 times more . --------------------------------------------- The common name air is given to the atmospheric gases used in breathing and photosynthesis. By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. Atmosphere of Earth - Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Atmosphere_of_Earth |
10-15-2015, 06:52 PM | #46 |
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Re: Welding in Patch Panels on a Cowl
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There are other combos for similar reasons with other metals Some of the gasses are also chosen to stabilize the arc, not just shield from air
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10-15-2015, 07:23 PM | #47 | |
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Re: Welding in Patch Panels on a Cowl
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Some of the tri-mixes had O2 in them, which seemed ass-backwards to me, since the O2 was what you were trying to shield out, but I was not an expert. |
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10-15-2015, 08:09 PM | #48 |
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Re: Welding in Patch Panels on a Cowl
I learned to "Heliarc" in 1960 while working in a small "job" shop. We built machines and parts for the electronics development industries. We did a lot of development for Raytheon and Sylvania. After a few years I started my own small shop. I closed my shop about three years ago. During that time I used straight argon on my "tig" welder. The reason is that although a mix with co2 will do slightly better on steel, you don't want any co2 on aluminum (which we did a lot of). That way we only had to have one type of gas on hand. I am certainly not a expert, but that worked well for a long time. The last few years I have been doing some metal shaping as a hobby. I too have come to prefer the butt weld with TIG but I also like the A/O torch with RG 45 rod. The weld is much softer and can be stretched easily. Ron W
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10-16-2015, 12:03 AM | #49 |
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Re: Welding in Patch Panels on a Cowl
Just pay the man! they will save you hours and hours of time and frustration.
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10-16-2015, 06:49 AM | #50 |
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Re: Welding in Patch Panels on a Cowl
The welding gas mix you need depends on what weld structure is required.
Better penetration, less porosity..... Welding gases for mig Welding gases another site |
10-16-2015, 07:18 AM | #51 | |
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Re: Welding in Patch Panels on a Cowl
Thanks for posting this! With all the talk about CO2 and global warming, it's a fun fact to know that CO2 is less than 1%, less than .5 of 1%. Better quit here before it gets political!
Terry Quote:
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10-16-2015, 07:49 AM | #52 |
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Re: Welding in Patch Panels on a Cowl
Vin tin you can't use 75 25 mix with a tig . Leaves pits in the weld .
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10-16-2015, 07:51 AM | #53 |
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Re: Welding in Patch Panels on a Cowl
Bills panel welded in
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