HARRIS-0 bar 1.3x3.2x500mm (28-60), Copper-phosphorus solder

American analogue of PMF-7 solder (copper-phosphorus solder with a phosphorus content of 7%)
Alloys of copper with phosphorus (4-9%) have a high fluidity and a relatively low melting point, they are used as substitutes for silver and copper-zinc solders when soldering copper and its alloys. These solders have self-fluxing properties and allow soldering of copper and its alloys without the use of fluxes. When soldering brass, bronze, nickel silver, and copper-nickel alloys with copper-phosphorus solders, it is necessary to use boron-containing fluxes (anhydrous borax, boric acid, mixtures thereof, PV-209). For soldering steels and cast iron, copper-phosphorus solders are not used because of the formation of brittle iron phosphides in the brazed seam, which leads to loss of ductility and embrittlement of the joint.
Traditionally, copper-phosphorus solder is used for soldering copper pipes of refrigerators and air conditioners using gas-flame heating.

Solder composition: copper base, phosphorus 7.1%
Soldering temperature: 732-816°C
Colour: shiny, characteristic copper
Rectangular bar size: 1.3 mm X 3.2 mm