Silverphos 6HP


Silverphos 6HP is a low cost brazing filler metal suitable for joining copper to copper and copper to copper alloys where critical impact or vibration stresses are not encountered in service. It should only be used on assemblies where good fit up can be maintained.

Available Forms

Wire, engineered preforms, specialty preforms per customer specification, powder and paste


SP6HP is a copper rich, intermediate temperature filler metal that is self-fluxing on copper by virtue of its phosphorus content. SP6HP has good flow and wetting properties on copper, brass, and bronze and is extremely fluid when heated rapidly to its flow point. The self-fluxing property of SP6HP is effective on copper only. Copper base alloys, such as brass or bronze, may be brazed with SP6HP but cannot be used on ferrous metals or nickel base alloys, since the phosphorus produces brittle iron or nickel phosphorus at the joint interface.


The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal. When brazing copper alloys the properties of joints with good fit-up should exhibit adequate performance. If poor fit-up prevails, or shear area is marginal, a lower phosphorus content silver-copper-phosphorus alloy such as Silverphos 5 may be preferred, particularly if the joints are to be subjected to impact or vibration in service.


American Welding Society (AWS)



1190 F / 643 C


1325 F / 718 C


The information and recommendations contained in this publication have been provided without charge & compiled from sources believed to be reliable and to represent the best information available on the subject at the time of issue. No warranty, guarantee, or representation is made by the Prince and Izant Company, Inc. as to the absolute correctness or sufficiency of any representation contained in this and other publications; Prince and Izant Company, Inc. assumes no responsibility in connection therewith; nor can it be assumed that all acceptable safety measures are contained in this (and other publications, or that other or additional measures may not be required under particular or exceptional conditions or circumstances.

Silverphos 6HP AWS: BCuP-4

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