MIG Welding Carbon Steel Joint SetUP, Electrodes and ...
MIG Weld on Carbon Steel Carbon Steel Joint Preparation and SetUp. Joint preparation for carbon steel is the same as if you are stick welding with an E7018. The weld area needs to be free of oils, paints, heavy rust, and in most cases mill scale. Ideally you want to grind the joint area back about 1 ½ of an inch to clean metal.