Quote:
Originally Posted by Talonmotorsport
MIG Pros: reasonably clean weld,medium spatter, looks good if done well, quick, machine is reasonable in cost.
Cons: welds may look good but with out understanding of weld prep or no penetration can be weak, gas can be exspensive.
TIG Pros: very neat welds, no spatter ,penetration can be seen,no clean up needed of welds.
Cons: machine not cheap, slow,akward in tight spaces, may need 3 hands for tacking,gas not cheap.
MMA/arc/stick Pros: very strong ,cheap machines,can be used outside.
Cons: very messy, lots of spatter, slag on welds,damp rods if not stored correctly,easy to blow holes in tight gauge material.
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That's well put together Phil
I agree, out of all weld procedures, MIG welding if not done correctly will produce a very weak weld .... The MIG can & will weld cold if not enough welding current is used. ( This is easier to detect in other welding methods )
The weld will look neat but will lack penetration
The original Lotus 7 chassis was indeed brazed, Bronze welded with Oxy/Accet & Nickle/Bronze filler rods.
A good Nickle/Bronze weld should produce a very strong weld, equal or better strength than the parent metal.
Not too much distortion as a lot less heat is used whilst brazing ( When compared to mild steel welding with Oxy/Accet )
The cost of renting & filling Oxy/Accet bottles has gone through the roof .... At least with MIG or TIG, you only need to pay rental on one bottle if you have to