Being a professional in any field is no easy task. It demands hard core and continuous smart work. Similarly, a professional welder needs to attain the certification for an adequate job. It is as difficult as passing a school test without preparation. There is equivalent nervousness and uncertainty involved in such tests.
But what about those of us who are facing a deadline for completing a real paying welding job? If you are in that boat with me, then you know you either need a spare MIG Welding Machine, or you need to be able to fix your problem quickly and get to welding again.
A small gasless machine can weld mild steel sheet metal, box sections, angle iron and plate. What it really comes down to is how much power the mig welder has. The thicker the metal, the hotter the weld needs to be. You can weld up box trailers and do repairs to them. You can make modifications to you street cars or race cars. Any little welding project a gasless mig welder is handy to have.
2% thoriated tungsten electrodes will weld everything. Thorium is radioactive so if that scares you, get some 2% lanthanated and it will work for everything. Use the smallest electrode that will get the job done within reason.
Make sure the machine is equipped to run in extreme conditions. The machine should not give up and stop working when it is either too hot or too cold. This would be a feature that should be given very close consideration. This can be a very big fall out if your machine pulls you down when the temperature is not suitable for it, because work doesn’t stop then.
Spray transfer mig welding requires a different shielding gas than what is normally used for short circuit mig welding, ( I will explain short circuit mig later) gas mixtures of 90/10 argon/co2, 95/5 argon/co2, and 98/2 argon/o2 are used for spray transfer mig along with much higher voltage settings.
I do not at all recommend this for anyone who is serious about making money in a production welding environment or welding and fabrication business. It will cause to much trouble.
You can also use stud welding with a variety of steels including aluminum, stainless steel, copper, brass and even zinc. Some of the more exotic steels can also be used in this process. This process also eliminates the need to do anything extra to the holes like drilling or tapping and the surface metal will not have to be touched up by polishing; this method does it all. This makes a very strong connection.