The filler material is selected according to the melting temperature of the base metal, as this type of alloy is characterised by a high melting/working temperature. The addition of silver, manganese, tin or silicon gives the alloy greater smoothness, reducing (albeit slightly) the melting temperature.

They are to be used only with a high-temperature flux and can also be supplied with a flux coating.

Nickel-brass is a popular choice for the mechanical properties it provides to joints and is widely used in the manufacture of large tools.