From: David Cole (DavidCole@tk7.net)
Date: Mon Mar 22 2004 - 09:37:10 PST
1/4" plate should not be a problem at all. Unless you can weld it close to
flat, horizontal, etc. - I wouldn't try it with an AC welder. AC is tough
to control if it isn't near flat, of course some really expert welders seem
to be able to weld just about anything with AC - however DC is a lot
easier. If you can get to a DC welder, 6011 rod should work even if it is
vertical. I'd weld it top to bottom. With 6011 rod you can get by without
grooving the crack much. If you use your mig welder, I'd groove the crack
about halfway through with a grinder and weld it top to bottom also.
Practice on some other 1/4 plate first and see what happens. Your mig
torch and or the 6011 rod should be tipped down about 30 degrees from
horizonal if you are welding vertical down. The arc will tend to push the
metal into the crack if done properly. If it is a long crack, tack it at
the end of the crack and every couple inches before running a long bead.
Regarding amps, I think your SP-175 (175 amps max?) should be plenty. For
DC welding I'd use an 1/8 rod at about 145 amps on my DC buzz box machine
(ancient Century brand labeled as Montgomery Wards, etc).
Good Luck!
Dave
On Mon, 22 Mar 2004 08:39:46 -0500, Richard Lathrop <lathrrs@snip.net>
wrote:
> Anyone on the list have experience welding armor plate?
>
> I have a crack in the door on my V100 that I need to fix.
>
> Looking at the V100 maintenance manual and the Army welding manual online
> I have a bit of understanding.
>
> My concern is about the amperage I need to weld 1\4 plate.
>
> I have a Lincoln SP-175 mig and access to a AC-225 stick welder but I am
> not sure if these will give the amperage I need to weld the plate.
>
> Thanks, Rick
>
>
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-- Dave
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