Copper Phos Brazing Alloys

SAFRABRAZE COPPER PHOSPHORUS BRAZING ALLOYS – Self-Fluxing

Brazing with silver-copper-phosphorus and copper phosphorus alloys is widely used for the joining of copper to copper, where the absence of a flux is a major benefit. The self-fluxing action of the phosphorus ensures that flux entrapment problems are largely avoided and that high standards of joint soundness can be maintained.

High phosphorus levels give excellent capillary penetration since the fluidity of the molten brazing alloy is controlled by the phosphorus content. Alloys with high phosphorus contents are less ductile than those with lower phosphorus and the higher silver contents. For applications where optimum mechanical strength or resistance to vibration is required, the lower phosphorus alloys are preferred (i.e. SafraBraze 2AG & 5AG). The tin-containing alloy, SafraBraze OT, offers controlled fluidity, a low melting point and joints of good appearance. phosphorus-containing alloys should not be used on ferrous or nickel-based parent alloys as they will result in brittle joints. This family of alloys can also be used for brazing high copper content alloys, provided a suitable flux is used.

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