allys, bismuth bronze



allys, bismuth bronze defined in 1909 year

allys, bismuth bronze - Allys, Bismuth Bronze;
allys, bismuth bronze - A metallic alloy, which the inventor calls bismuth bronze, was introduced by Webster, as specially suitable for use in sea-water, for telegraph and music wires, and for domestic articles. The composition varies slightly with the purpose for which the bronze is to be used, but in all cases the proportion of bismuth is very small. For a hard alloy, he takes 1 part bismuth and 16 of tin, and having melted them, mixes them thoroughly as a separate or preliminary alloy. For a hard bismuth bronze he then takes 69 parts copper, 21 spelter, 9 nickel, and 1 of the bismuth tin alloy. The metals are melted in a furnace or crucible, thoroughly mixed, and run into moulds for future use. This bronze is hard, tough, and sonorous; it may be used in the manufacture of screw-propeller blades, shafts, tubes and other appliances employed partially or constantly in sea-water, being specially suited to withstand the destructive action of salt-water. In consequence of its toughness it is well suited for telegraph wires and other purposes where much strain has to be borne. From its sonorous quality, it is well adapted for piano and other music wires. For domestic utensils, and other articles generally exposed to atmospheric influence, the composition is 1 part bismuth, 1 aluminium, and 15 tin, melted together to form the separate or preliminary alloy, which is added in the proportion of 1 per cent, to the above described alloy of copper, spelter, and nickel. The resulting bronze forms a durable, bright, and hard alloy suited for the manufacture of spoons, forks, knives, dish-covers, kettles, tea-pots, jugs, and numerous other utensils. These alloys are said to resist oxidation, to polish well and easily, and to keep their colour well.

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