What does "joint strength" depend on in brazing?

Joint strength in brazing primarily depends on material compatibility and fitting. This is because the effectiveness of a brazed joint is greatly influenced by how well the base metals fit together and whether they are compatible. Proper fitting ensures that there is a uniform gap for the filler metal to flow into, allowing for effective bonding between the materials.

Additionally, certain materials may react differently with specific filler metals, affecting their bond strength. If the materials are not compatible or if they do not fit well together, the joint may not achieve the desired strength, regardless of the filler metal used.

Factors such as the location of the joint, the appearance of the joint, and the filler metal are also important, but they are secondary to the fundamental requirement for good compatibility and proper fit in achieving joint strength.