I.—Sheet brass, 12 parts; zinc, 4 to 7 parts, and tin, 1 part.
II.—Copper, 16 parts; zinc, 16 parts, and tin, 1 part.
III.—Yellow solder, 20 to 30 parts, and tin, 1 part.
White solders:
I.—Sheet brass, 20 parts; zinc, 1 part, and tin, 4 parts.
II.—Copper, 3 parts; zinc, 1 part, and tin, 1 part.
To Hard-solder Parts Formerly Soldered With Tin Solder.
Silver Solders.
Silver solder is cast in the form of ingots, which are hammered or rolled into thin sheets. From these small chips or “links,” as they are called, are cut off. The melted solder can also be poured, when slightly cooled, into a dry iron mortar and pulverized while still warm. The solder can also be filed and the filings used for soldering.
Silver solders are used not only for soldering silver objects, but also for soldering metals of which great resistance is expected. A distinction must be drawn between silver solder consisting either of copper and silver alone, and silver solder to which tin has been added.