Fillet welds join two surfaces at a right angle with what type of bead?

Fillet welds join two surfaces at a right angle with what type of bead?

• A. Triangular bead
• B. Square bead
• C. Circular bead
• D. Rectangular bead

Answer: (A)

When joining two surfaces at a right angle, a fillet weld fills the corner between them, and the deposited metal runs along each surface. This creates a cross-section that looks like a triangle, with the two legs spanning along the meeting faces. The bead’s triangular shape comes from the way the weld sits in the corner, bounded by the two metal faces and the weld face. Because of this geometry, a triangular bead is the characteristic shape for fillet welds.

When joining two surfaces at a right angle, a fillet weld fills the corner between them, and the deposited metal runs along each surface. This creates a cross-section that looks like a triangle, with the two legs spanning along the meeting faces. The bead’s triangular shape comes from the way the weld sits in the corner, bounded by the two metal faces and the weld face. Because of this geometry, a triangular bead is the characteristic shape for fillet welds.