What considerations are there for brazing filler metals that contain tin or silicon?
Tin containing filler metals are hot-short and may be prone to cracking if quenched from high temperatures (in excess of 300˚C). This is particularly the case with filler metals with medium or high brazing temperatures. They should not be quenched when used to braze components with widely differing coefficients of thermal expansion. Filler metals containing silicon may be used to braze steel assemblies but are not recommended where steel components are subject to high impact or fatigue stress in service as the silicon forms a brittle iron intermetallic.
