Other Easily Fusible Alloys:
| VII | VIII | IX | |
|---|---|---|---|
| Lead | 1 | 2 | 3 |
| Tin | 1 | 2 | 3 |
| Bismuth | 1 | 1 | 1 |
| Melting Point | 258° F. | 283° | 311° |
Fusible Alloys For Electric Installations.
| Fusing temperature | Lead | Tin | Bismuth | Cadmium | |
|---|---|---|---|---|---|
| I | 203° F. | 250 | 500 | 500 | — |
| II | 193° F. | 397 | — | 532 | 71 |
| III | 168° F. | 344 | 94 | 500 | 62 |
| IV | 153° F. | 260 | 148 | 522 | 70 |
| V | 150° F. | 249 | 142 | 501 | 108 |
| VI | 145° F. | 267 | 136 | 500 | 100 |
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These alloys are prepared by melting the lead in a stearine bath and adding successively, and during the cooling, first, the cadmium; second, the bismuth; third, the tin. It is absolutely necessary to proceed in this manner, since these metals fuse at temperatures ranging from 850° F. (for lead), to 551° F. (for tin).
Fusible Safety Alloys for Steam Boilers.—
| Bismuth | Lead | Zinc | Melting point | Atmos. pressure | |
|---|---|---|---|---|---|
| I. | 8 | 5 | 3 | 212° F. | 1 |
| II. | 8 | 8 | 4 | 235° F. | 1.5 |
| III. | 8 | 8 | 3 | 253° F. | 2 |
| IV. | 8 | 10 | 8 | 266° F. | 2.5 |
| V. | 8 | 12 | 8 | 270° F. | 3 |
| VI. | 8 | 16 | 14 | 280° F. | 3.5 |
| VII. | 8 | 16 | 12 | 285° F. | 4 |
| VIII. | 8 | 22 | 24 | 309° F. | 5 |
| IX. | 8 | 32 | 36 | 320° F. | 6 |
| X. | 8 | 32 | 28 | 330° F. | 7 |
| XI. | 8 | 30 | 24 | 340° F. | 8 |
Lipowitz Metal.
This amalgam is excellently adapted for the production of impressions of various objects of nature, direct impressions of leaves, and other delicate parts of plants having been made with its aid which, in point of sharpness, are equal to the best plaster casts and have a very pleasing appearance. The amalgam has a silver-white color and a fine gloss. It is perfectly constant to atmospheric influences. This amalgam has also been used with good success for the making of small statuettes and busts, which are hollow and can be readily gilt or bronzed by electro-deposition. The production of small statues is successfully carried out by making a hollow gypsum mold of the articles to be cast and heating the mold evenly to about 140° F. A corresponding quantity of the molten amalgam is then poured in and the mold moved rapidly to and fro, so that the alloy is thrown against the sides all over. The shaking should be continued until it is certain that the amalgam has solidified. When the mold has cooled off it is taken apart and the seams removed by means of a sharp knife. If the operation is carried on correctly, a chasing of the cast mass becomes unnecessary, since the alloy fills out the finest depressions of the mold with the greatest sharpness.