Hi,

I've just discovered that the current ratings for MIGs and those for ARC/
MMA are not nominally equivalent and that MIG ratings have to be higher
to match the abilities of ARC. To cut a long story short, what current
rating does one need for a MIG to be able to handle the sort of
thicknesses of steel you typically find in car bodies? Would 30-90A do
it?
90A from an ARC welder would probably blow holes in car body steel, I
reckon!

On 23/08/2017 13:40, Chris wrote:

Hi,

I've just discovered that the current ratings for MIGs and those for ARC/
MMA are not nominally equivalent and that MIG ratings have to be higher
to match the abilities of ARC. To cut a long story short, what current
rating does one need for a MIG to be able to handle the sort of
thicknesses of steel you typically find in car bodies? Would 30-90A do
it?
90A from an ARC welder would probably blow holes in car body steel, I
reckon!

90A is ample.

Mike

On Wednesday, 23 August 2017 13:44:25 UTC+1, Chris wrote:
Hi,

I've just discovered that the current ratings for MIGs and those for ARC/
MMA are not nominally equivalent and that MIG ratings have to be higher
to match the abilities of ARC. To cut a long story short, what current
rating does one need for a MIG to be able to handle the sort of
thicknesses of steel you typically find in car bodies? Would 30-90A do
it?
90A from an ARC welder would probably blow holes in car body steel, I
reckon!

For car panels it's the low end that matters, the 30A figure. That's the ballpark figure I was using with MIG.


NT

"Chris" wrote in message
news
To cut a long story short, what current
rating does one need for a MIG to be able to handle the sort of
thicknesses of steel you typically find in car bodies? Would 30-90A do
it?

2030amp is ok for thin body panels with mig,
20amp or under for ark but most cheap ark dont go that low
and even with ones that do and 1mm rods its not easy


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