BrazeTec Brazing Alloys Containing Phosphorous for Copper and Copper AlloysBrazing alloys containing phosphorous can be generally used for operating temperatures ranging from -55ºC to +155ºC.The alloys have been developed specifically for brazing copper-to-copper and copper-to-copper alloys (brass, bronze). When copper is brazed with a copper-phosphorous alloy it is not necessary to use a flux due to the phosphorous content. When a copper alloy is brazed with copper-phosphorous, flux must be used.It is not recommended to use these alloys when the joint is in contact with sulphur: the formation of sulphuric acid damages the joints brazed with this type of alloy. Moreover the use of these alloys is not recommended to braze steel and nickel alloys because intermediate stages can create embrittlement.The S2 and S94 alloys have been approved by the DVGW for copper piping installation.