Surface Condition
Components should be clean, free from swarf, rust and excess grease before brazing.
It should be noted that score marks, shot blasted or roughened areas in the region of the brazed joint will pull the braze filler metal away from the joint.
Post Braze Processes
Due to the high melting point of the braze material [1083°C for Copper] most commonly used hardening and case hardening heat treatments can be carried out after brazing. Also most plating processes take well on copper brazed components.

Main Advantages of Furnace Brazing

1. Distortion due to uniform heating and cooling minimised.
2. Joint strengths greater than the parent metal are possible.
3. Parent metals are not fused or damaged.
4. Stresses are relived during brazing.
5. No surface deterioration takes place during the process.
6. Dissimilar metals can be brazed together.
7. Different metal thickness are permissible in brazed joints.
8. Multiple joints can be brazed at once.
9. Long and inaccessible joints can be filled successfully.
10. Complicated and delicate assemblies have been brazed which could not have been manufactured by any other route.
11. Skilled labour is not required to carry out the process.
12. Rapid reproducible results are obtainable.

1. Close fits are necessary to facilitate the capillary action.
2. Component parts will be annealed during the process.
3. Provision for location of the brazing material has to be allowed for in the design.