Welding Different Plate Thickness. Thickness of the base metal when 100 weld i. The welding of two specimens of different thickness 1 2 mm 1 3 mm and 1 45 mm was carried out using the spot welding machine type BV 2521.
Below some tables with acceptable design for unequal wall thicknesses ASME B318. Hello I have been working a company for about 4 months and overheard a discussion regarding two different objects that need to be welded together both were mild steel. If the plates are different thicknesses the thinner plate thickness should be used An example t-joint is shown below with a weld size of 38 on 12.
If one of the plates is 4 inches thick and the other is only 14 inch thick the weld between them can be on the 14 inch side the weld size would be 14 inch of the joint or it can be in the 4 inch plate and it would be somewhat thicker depending on the weld detail involved.
Once you are above the 34 plate thickness the minimum weld size is never going to be larger than 516 as this is the maximum single pass size allowed for many common welding processes. Striking an arc directly on the thin will cause burn-away so its best to wash it over from the thick piece. This taper should not exceed 30. Return to Stick welding.