In article , lid
says...

Two tasks:

- Join 2 pieces of 1" steel pipe

- Join multiple sections of angle iron to make
a boat trailer dolly.


I am thinking el cheapo Harbor Freight because this device will probably only
be used a few times.

But what size?

I see various welders from $100 to $300+, but they are all 240v.

The only 120v one I see is 80 amps:
https://www.harborfreight.com/quickv...index/id/10859

Will 80A suffice for the tasks described?




This iseems to be the case of if you have to ask, you need to learn more
before you start.


Just a general rule to start with is it will take 100 amps for every .1
inches. If that welder you are looking at is truely 80 amps the
thickest you will normally weld is going to be .08 ihches thick.

I would think the angle iron would be thicker than that.


While thicker material can be welded than that, usually it is built up
in layers.

You did not specify if it was a wire welder or one that you use the
sticks with.