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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 ?
Erema says it isn't seeking patents on the alloying process because it believes that too much is known about it through prior technical publications.
The commercial Catalloy process is similar in concept to Himont's developmental Hivalloy technology except that where Catalloy is an olefinic alloying process, Hivalloy products are made by co-reacting the base PP spherule with up to 50-60% by weight of non-olefinic monomers.
It's also clear alloying and blending technology will not replace future research into inventing all-new polymers or supplant work to optimize existing single-resin grades.
Scandium has been effectively used as an alloying element in aluminum in many applications in the former Soviet Union, including aerospace, due to the fact that the alloy exhibits increased strength, durability, plasticity and fatigue resistance.
It was one of the quieter introductions of a major new alloying technology, made possible in part by grafting polypropylene with non-olefinic monomers (see PT, Aug.
This article examines five alloying elements as possible pearlite stabilizers to promote improved properties in gray cast iron production.
part of the Montecatini/Montedison group in Italy, presented a paper at NPE on a major new resin alloying technology to produce new super-hard PP alloys--Hivalloy ("High-value alloy")--with enhanced properties like HDT of 275 F, notched Izod impact strength of 5.
Slag typically refers to high-temperature fluxing of refractory linings of furnaces/ladies and oxidation products from alloying.
New abilities to tailor crystallization rates and improve process-ability, a plethora of chemical varieties, an expanded range of high-end performance in thermal and mechanical properties, and an accommodating nature with regard to alloying and copolymerization, all mark thermoplastic polyesters as a dynamic engineering resin technology for the 1990s.
While various alloying elements may alter the properties of cast iron, it is accomplished primarily through the crystallization of dissolved carbon into graphite.
Advances Reported in Alloying And Compatibilization
In aluminum-silicon (Al-Si) hypoeutectic alloys, strontium is often added for modification of the Si structure during the alloying process.