The maximum length of a slot weld is equal to how many times the thickness of the part?

The maximum length of a slot weld is equal to how many times the thickness of the part?

• A. 5X thickness
• B. 8X thickness
• C. 12X thickness
• D. 10X thickness

Answer: (D)

Slot weld length is limited in proportion to the part’s thickness to control heat input and distortion while still providing enough weld area to carry load. The guideline commonly used is that the maximum length should not exceed about ten times the thickness of the thinner plate. This 10:1 ratio helps prevent burn-through on thinner parts, keeps the heat-affected zone reasonable, and maintains good weld quality and alignment. So, the longest acceptable slot weld length is 10 times the plate thickness.

Slot weld length is limited in proportion to the part’s thickness to control heat input and distortion while still providing enough weld area to carry load. The guideline commonly used is that the maximum length should not exceed about ten times the thickness of the thinner plate. This 10:1 ratio helps prevent burn-through on thinner parts, keeps the heat-affected zone reasonable, and maintains good weld quality and alignment. So, the longest acceptable slot weld length is 10 times the plate thickness.