When a joint is properly brazed, what should be visible around the joint?

When a joint is properly brazed, the expectation is that the filler metal has completely flowed into the joint and essentially disappeared from sight. This process creates a strong bond between the base materials without any visible excess filler metal around the edges. Proper brazing ensures that the filler metal is absorbed into the joint, meaning that there should be no visible appearance of it upon inspecting the joint afterward.

While flux residue and color changes may be present depending on the materials and techniques used, the key indicator of a successful brazed joint is the absence of any filler metal around the joint area. This would suggest that the brazing was done effectively, with the metal filling in the joint voids and properly bonding the parts together.