I have an old Wards 110v arc welder. It says its capable of welding up to 1/4 inch steel. I was fiddling with it the other day trying to weld something but it just kept sticking. Know matter how many times I tried, I could not get a weld started, it just kept sticking to the metal. The metal had just been cleaned with a die grinder and the ground clamp was on the clean part.