3512. Brass Solder for Brazing Iron or Steel

3512.    Brass Solder for Brazing Iron or Steel. Thin plates of brass are to be melted between the pieces that are to be joined. If the work be very fine - as when two leaves of a broken saw are to be brazed together - cover it with pulverized borax, dissolved in water, that it may incorporate with some brass powder which is added to it; the piece must be then exposed to the fire without touching the coals, and heated till the brass is seen to run.

3513. To Solder Ferrules for Tool Handles, etc.

3513.    To Solder Ferrules for Tool Handles, etc.. Take the ferrule, lap round' the jointing a small piece of brass wire, then just wet the ferrule, scatter ground borax on the joining, put it on the end of a wire, and hold it in the fire till the brass fuses. It will fill up the joining, and form a perfect solder. It may afterwards be turned in the lathe.

3514. To Tin Iron for Soldering, etc.

3514. To Tin Iron for Soldering, etc.. Drop zinc shavings into muriatic (hydrochloric) acid, until it will dissolve no more; then add 1/4 its bulk of soft water. Iron, however rusty, will be cleansed by this solution, and receive from it a sufficient coating of zinc for solder to adhere to. (See No. 3642 (To Tin Iron).)

3515. To Solder Grey Cast-iron

3515. To Solder Grey Cast-iron. First dip the castings in alcohol, after which, sprinkle muriate of ammonia (sal-ammoniac) over the surface to be soldered. Then hold the casting over a charcoal fire till the sal-ammoniac begins to smoke, then dip it into melted tin (not solder). This prepares the metal for soldering, which can then be done in the ordinary way.

3516. Solder for Iron

3516.     Solder for Iron. Fuse together 67 parts copper and 33 parts zinc. Or: 60 parts copper and 40 parts zinc.

3517. Hard Solder for Copper or Brass

3517.     Hard Solder for Copper or Brass. Take 13 parts copper and 1 part zinc. Or: 7 copper, 3 zinc and 2 tin.

3518. Solder for Brass in General

3518.    Solder for Brass in General. Take 4 parts of scraps of the metal to be soldered, and 1 part zinc.

3519. To Make Solder-Drops

3519.    To Make Solder-Drops. Melt the solder, and pour it in a steady stream of about 1/8 inch in diameter, from a height of 2 or 3 inches, into cold water; taking care that the solder, at the time of pouring, is no hotter than is just necessary for fluidity.

3520. Aluminum Solder

3520.      Aluminum Solder. Mouray employs five different solders, being different proportions of zinc, copper, and aluminum. The copper is melted first, the aluminum is then added in 3 or 4 portions; when the whole is melted, it is stirred with an iron rod. The crucible is then withdrawn from the fire, the zinc gradually stirred into the mass, and the whole poured into ingot shaped moulds, previously wiped out with benzine. The parts given in the following proportions are by weight.