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  • tigguy
    replied
    16th Engineers & 2/37 DAT's

    Oh how out of nowhere does a welding question bring back memories! I was with 1-36AIR in Friedberg and had an old Hobart PortaFeed 17 ran off of a Perkins diesel for all my aluminum repair. Had it down well enough to weld overhead on 113 bottoms when they would crack. Geissen was my second home for the Engineer's repair work. Funny how word travels when an aluminum job goes right. Every unit within 50 miles wants you to fix their deadlines. I've used helium with my Dynasty on thicker stuff but not with any mig work. Good info for any future applications though.

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  • tnjind
    replied
    Mine too.
    But still need to support the troops.

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  • MAC702
    replied
    Originally posted by USARMY44B View Post
    ...im in the army and cost dose not matter.
    My tax dollars at work...

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  • USARMY44B
    replied
    Originally posted by DSW View Post
    I was just wondering if you got the info I sent you. If not PM me and I'll send it again.
    i did get the info and thanx agine guys the way i figuered it was a waste to run it on mig

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  • chris2626
    replied
    Originally posted by fun4now View Post
    strait h and DC TIG can be used on thick aluminum. not shore the full details on it. but its doable.

    Thanks Dude

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  • DSW
    replied
    Originally posted by USARMY44B View Post

    and DSW i would love to know that because i have alot of small o2 bottles id like to fill for my mechanics. thanx
    I was just wondering if you got the info I sent you. If not PM me and I'll send it again.

    Leave a comment:


  • fun4now
    replied
    strait h and DC TIG can be used on thick aluminum. not shore the full details on it. but its doable.

    Leave a comment:


  • bigo
    replied
    I use a helium 97.5% argon 2.5% mix on s.s from 16 guage to 1" and it works nice , clean smooth and steady flow . i use it on the 10 to 16 guage m.s also welds about the same as the s.s, but on the thin ms my welder will key up to say 19 or 20 volts on the helishield, whereas to the same setting running co2 it pushes21 or 22, although i get almost twice the penetration on the helisheild which is nice charteristic of it on thin ms. i weld stuff that is constantly under a load or being torqued, and dont like it on thicker ms, as i beleive the arc is to soft, spray arc is nice with it but i like to really pour the heat and wire as the co2 lets the wire cut deep as your welding where the helium will burn your wire faster where in turnyour more app to undercut and not get adequete penetration if your welding 3/8 and half inch unbeveled. bevel the thicker stuff and run a bit cooler i imagine it would be a dream come truecompared to co2.

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  • chris2626
    replied
    Yes you can use helium to mig weld well I think what we have at work is like helium argon and carbon dioxide mixxed I think which supposely the helium helps the weld hotter without turning the heat higher on the machine but don't hold me to this. I've got a question about Helium. I know to weld aluminum you need AC but I thought my old welding teacher told me once that you could weld aluminum with helium have any of you tried this? and it may have been on DC I 'm really not sure though

    Chris
    Last edited by chris2626; 03-07-2008, 09:00 PM.

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  • fun4now
    replied
    man i had a lot of fun in Stuttgart. i was with the 1/16 over there and 2/37 i think it was tankers. was way back when they first got the M-1's every thing was shiny and new.
    had a house in Burblagin (who knows how to spell it??)loved the mas transit, always on time and you could get anywhere.
    nice place, almost stayed when i got out.

    keep in mind HE unlike argon, wants to rise. so ya need higher flow rates.

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  • DSW
    replied
    I sent you an email and PM.

    Just want to thank all of you over there for all you are doing to keep us safe.

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  • USARMY44B
    replied
    Originally posted by SundownIII View Post
    USARMY44B,


    Where in Germany are you. Spent a little time myself in Stuttgart (Ludwigsburg) as S3 of the 7th Engineer Brigade.
    im senior welder in 317th maint in bamberg germany


    thanks for the info guys the reson i ask is because we just got in a few bottles for my tig and i have a job for pit covers im making them out of alum dimond plate and the oic wants me to mig them for time but my spool gun is for my hobart welding trailer. i think its older then i am. so i dont know how well its going to work if it is going to work. my plan was to tig it for the practice. when i did try it i noticed that the the heat with he likes a lower freq then argon. what i mean is on 200 htz the arc took longer to stablize and the bead was taller then normal and the consistacy was harder to mantain. but at 50htz it was perfect. any thoughts?


    and DSW i would love to know that because i have alot of small o2 bottles id like to fill for my mechanics. thanx

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  • DSW
    replied
    USARMY44B.

    If you need to mix gases PM me. I regularly mix He for diving and transfill argon for dive suit inflation and can probably get you close with partial pressure mixing. Not to hard but you will need certain fill adapters, special fittings for Hp gas, etc. I can tell you where to get these thru an approved military supplier if needed.

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  • SundownIII
    replied
    USARMY44B,

    Miller has a good write-up on the uses of Helium in their GMAW handbook (page 140). You should be able to download it, or you can order a copy thru the mail.

    Basically, for short circuit, low alloy steel, a 60-70%HE + 25-35% Argon + 4-5% CO2 mix gives "minimum reactivity; excellent toughness; excellent arc stability, wetting characteristics, and bead contour; little splatter".

    On alum, copper, magnesium, nickel, and their alloys an Argon + Helium mix is preferred on thicker sheet material (over 1/8").

    In spray transfer, a 35% Argon + 65% Helium mix isrecommended for aluminum plate 1"-3" thick (because of higher heat output).

    For plate over 3" a 25% Argon + 75% Helium mix is recommended.

    Looks like an Argon + Helium mix is also recommended for some Copper, Nickel and their alloy applications.

    At the present time, Helium is in short supply in the US. I think it would be used more except for the cost.

    Hope this helps.

    How do you plan to mix your gases. Best way, of course, is with something like the Smith Proportional mixer. If not, you're sorta just shooting in the dark regarding proportions.

    Where in Germany are you. Spent a little time myself in Stuttgart (Ludwigsburg) as S3 of the 7th Engineer Brigade.

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  • USARMY44B
    replied
    cost dosent matter and i dont have a lws the speacks english and most of my consumables come from come through the supply system.

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