Re: Exhaust welds (Project20v)
quote:[HR][/HR]Without getting into details Mig welds are pretty good for mild steel or aluminized steel. Tig welds are far superior, the penetration is superb. One nice thing about Tig welding is that you can join two parts with no filler allowing for a very clean look while achieving a true bond. On your next question, if I was going to spend 900 on a system, I would spend another 100 for Tig welds. However I would assume the materials would be different. Mig is generally associated with mild steel and Tig with Stainless or aluminum. A higher quality alloy goes along with a higher quality weld process.[HR][/HR]
exactly, Stainless steel requires a much higher melting point to get achieve 100% bonding, and MIG welding can't accomplish that. I would never ever buy a stainless steel exhausts with MIG welds.
I used to work in a shop that fabricated custom awnings, and we used both types. MIG welds are far inferior in quality and finish compared to TIG welds. The cost of TIG welds mostly makes up for the expense of the gas used. Some shops won't even fire up their TIG welder for less then 70-80 bucks, even to weld a pipe.
MIG welding stainless steel is the equivalant of using cotton threads to mend silk shirt... it will work to the point of functionality, but not your best choice.