alloy

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ALLOY, or ALLAY. An inferior metal, used with gold. and silver in making coin or public money. Originally, it was one of the allowances known by the name of remedy for errors, in the weight and purity of coins. The practice of making such allowances continued in all European mints after the reasons, upon which they were originally founded, had, in a great measure, ceased. In the imperfection of the art of coining, the mixture of the metals used, and the striking of the coins, could not be effected with, perfect accuracy. There would be some variety in the mixture of metals made at different times, although intended to be in the same proportions, and in different pieces of coin, although struck by the same process and from the same die. But the art of coining metals has now so nearly attained perfection, that such allowances have become, if not altogether, in a great measure at least, unnecessary. The laws of the United States make no allowance for deficiencies of weight. See Report of the Secretary of State of the United States, to the Senate of the U. S., Feb. 22, 1821, pp. 63, 64.
     2. The act of Congress of 2d of April, 1792, sect. 12, directs that the standard for all gold coins of the United States, shall be eleven parts fine to one part of alloy; and sect. 13, that the standard for all silver coins of the United States, shall be one thousand four hundred and eighty-five parts fine, to one hundred and seventy-nine parts alloy. 1 Story's L. U. S. 20. By the act of Congress, 18th Feb. 1831, Sec. 8, it is provided, that the standard for both gold and silver coin of the United States, shall be such, that of one thousand parts by weight, nine hundred shall be of pure metal, and one hundred of alloy; and the alloy of the silver coins shall be of copper, and the alloy of gold coins shall be of copper and silver, provided, that the silver do not exceed one-half of the whole alloy. See also, Smith's Wealth of Nations, vol. i., pp. 49, 50.

References in periodicals archive ?
In Figure 5, the pull-out force (POF) adhesion results of brass-coated steel cord in a cobalt-containing compound (the "reference system"), brass-coated steel cord in a cobalt-free compound and Cu-Zn-Co ternary alloy coated steel cord in a cobalt-free compound upon initial adhesion (RC, regular cure) and after steam aging, after 0, 160, 320 and 420 kcycles of cyclic loading, are shown.
MEP surface treatments were effective in increasing surface roughness for ternary alloys with magnetic elements like Cu and Cr, whereas EP surface treatments were marginally less effective on binary and ternary Nitinol alloys without a magnetic ternary element.
1-10) Although the literature concerning ternary alloys is very limited in comparison with that of binary alloys, it has been found that Zn-Ni-Fe alloys are valuable for their leveling action.
In summary, the influence of Mn on the microstructure and the kinetics of the austenite phase transformation in the Fe-Mn-C ternary alloys are investigated.
Topics of the 17 papers on this very important discipline include silicon, the growth of gallium arsenide, computer modeling, indium phosphide, InSb and related ternary alloys, GaN substrates grown under pressure, CMT, sapphires, fluorides, quartz, diamond, silicon carbide and growth under minigravity conditions.
In the early 1970s several binary and ternary alloys were issued as SRMs for microanalysis-a W-20%Mo Alloy (SRM 480) (2), Fe-3Si (SRM 483) (3), the Au-Ag alloys (SRM 481) and Cu-Au Alloys (SRM 482) (4), the Fe-Cr-Ni alloy (SRM 479 and 479 a) (5,6), and a group of four different steels, (SRMs 661- 664).