Littleport22, the problem is not your welder , its your lack of knowledge about welding. You will not be able to "weld" a contact tip and an iron nipple as you describe. The metals are not compatable for fusion, you will have to use a method of cohesion such as "brazing, soldering "etc. These use disimilar metals to bond thru molecular adhesion not fusion. My advise Find the right parts, dont "mickey mouse" too much stuff or you will pay for it eventually, hopefully not with too much skin,hair or property.good luck......K
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