... .08 mm (0.0012 to 0.0031 in) are recommended for the best capillary action and joint strength. However, in some brazing operations ... . However, there are several factors that influence the joint designer's temperature selection. The best temperature is usually selected so as to: (1) be ... using nickel, iron, copper, silicon, boron, phosphorus, etc. Welding Tips: What Is Brazing?