part IV

.—Zinc 49 parts Copper 44 parts Tin 4 parts Lead 2 parts

Prechtl’s Composition.—

V.—Copper 53.3 parts Zinc 43.1 parts Tin 1.3 parts Lead 0.3 parts

All these hard-solder compositions have the fine yellow color of brass, are very hard, and can be fused only at high temperatures. They are well adapted for all kinds of iron, steel, copper, and bronze.

Solders which fuse at somewhat lower temperatures and, therefore, well adapted for the working of brass, are the following:

VI.—Sheet brass 81.12 parts Zinc 18.88 parts

VII.—Copper 54.08 parts Zinc 45.29 parts

VIII.—Brass 3 to 4 parts Zinc 1 part

A solder which is valuable because it can be wrought with the hammer, rolled out, or drawn into wire, and because it is tough and ductile, is the following:

IX.—Brass 78.26 parts Zinc 17.41 parts Silver 4.33 parts

Fusible White Solder.—

X.—Copper 57.4 parts Zinc 28 parts Tin 14.6 parts

Easily Fusible Solders.—

XI.—Brass 5 parts Zinc 2.5 parts

XII.—Brass 5 parts Zinc 5 parts

Semi-White Hard Solders.—

XIII.—Copper 53.3 parts Zinc 46.7 parts

XIV.—Brass 12 parts Zinc 4 to 7 parts Tin 1 part

XV .—Brass 22 parts Zinc 10 parts Tin 1