Which description best matches a typical fillet brazed joint geometry?

• A. A rounded bead around the joint.
• B. A flat, planar joint with no fillet.
• C. A square corner joint.
• D. A triangular brazed fillet at the joint with a smooth, continuous outer contour.

Answer: (D)

In brazing, the filler metal melts and wets the surfaces, moving into the joint by capillary action to form a fillet. The typical outcome is a triangular fillet along the seam, with a smooth, continuous outer surface where the filler bonds to both pieces. This shape shows good wetting and a continuous bead, which helps seal and strengthen the joint. The other descriptions describe situations that don’t reflect how brazing fills and smooths along the joint—no fillet at all, a separate rounded bead, or a sharp square corner—so they don’t match the common brazed joint geometry.