Table 6-2.Silver Brazing Filler Metal Alloys
comparable to those made by fusion welding without
Often, you will be called on to do a silver brazing
job. Table 6-2 lists different types of silver brazing
alloys and their characteristics. A popular way to apply
silver brazing metal on a tubing is to use silver alloy
rings, as shown in figure 6-17. This is a practical and
economical way to add silver alloy when using a pro-
duction line system. Another method of brazing by using
preplaced brazing shims is shown in figure 6-18. The
requirements of each job varies; however, through ex-
perience you can become capable of selecting the proper
procedure to produce quality brazing.
the destruction of the base metal characteristics. Braze
welding is also called bronze welding.
Braze welding has many advantages over fusion
welding. It allows you to join dissimilar metals, to
minimize heat distortion, and to reduce extensive pre-
heating. Another side effect of braze welding is the
elimination of stored-up stresses that are often present
in fusion welding. This is extremely important in the
repair of large castings. The disadvantages are the loss
of strength when subjected to high temperatures and the
inability to withstand high stresses.
Braze welding is a procedure used to join two
pieces of metal. It is very similar to fusion welding
The equipment needed for braze welding is basi-
with the exception that the base metal is not melted.
cally identical to the equipment used in brazing. Since
The filler metal is distributed onto the metal surfaces
braze welding usually requires more heat than brazing,
by tinning. Braze welding often produces bonds that are
an oxyacetylene or oxy-mapp torch is recommended.