Welding Different Thickness Material. I used 120 wall one inch and one and quarter square tubing and then 14 plate for the top. 14 Relevancy of The Project.
The material were welded by using shielded metal arc welding and then sectioning mounting grinding polishing and etching for metallographic examination. It will contain recommended settings. Before welding I set my inverter welder to 150 amps output pulse rate at 200 and clamped 18 x 34 copper bars behind the sheet metal.
There is no minimum for deposited weld metal thickness.
Still have some left of the 1 14 - had to buy 20 foot pieces of both. It will contain recommended settings. The surface of the weld can also be tapered to accommodate differing thickness. This job required welding the 316 thick steel mounting plate of each caster to the 20 gauge steel framework at each corner.