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Talk:Alloy From Wikipedia, the free encyclopedia Jump to: navigation, search ChemistryWikipedia:WikiProject ChemistryTemplate:ChemistryChemistry articles Chemistry portal v•d•e

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This article is within the scope of WikiProject Chemistry, a collaborative effort to improve the coverage of chemistry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks. This article has been rated as C-Class on the project's C quality scale. This article has been rated as High-importance on the project's importance scale. [show]Comments: edit · history · watch · purge High end of 2nd section: kim is silly? makes me doubt the validity of this entire article

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Contents [hide] • 1 It's a stub • 2 Making of Alloys • 3 Gold alloy purity • 4 Link suggest ions • 5 Compo und? • 6 Alloys moved to list of alloys • 7 percent ages ? • 8 Is it possibl e to "undo" an alloy? • 9 Propose d project • 10 Alloy number ing systems • 11 Young's modulu s • 12 Redirec t of

[edit] It's a stub I suggest that this article be labeled as a "stub" because it is so extremely incomplete. I have added something to it, but the previous article didn't even mention solder, electrum, pewter,and it didn't mention that most alloys are harder than the primary constituents that go into them. That was the whole reason for things like the Bronze Age.74.249.77.168 (talk) This article should not be down graded to a stub. There is too much info to be classified as a stub. It is, however, classified as a C-class to reflect its major deficiencies. We welcome any additions you have. --Wizard191 (talk) 12:44, 20 September 2008 (UTC)

[edit] Making of Alloys what are the main difference between alloy and composite matriels??? The difference between alloys and composites lie at the molecular level. In alloys, the atoms are re-arranged together in a crystalline structure, but none of this happens in composites, such as in the graphite-epoxy ones that are used in electronics and aerodynamics.74.249.77.168 (talk)

[edit] Gold alloy purity "14k gold is an alloy of gold " <- does the "k" mean carat? -- Tarquin 18:46 Dec 28, 2002 (UTC) Yes. See also Carat (purity). -- Why Not A Duck 21:19, 17 April 2007 (UTC) carat should be spelled out when it is used - not everyone knows this abbreviation. k also means "kilo", and K means "Kelvin", and k is also used for Boltzman's constant in physics, chemistry, and engineering.74.249.77.168 (talk) 01:00, 20 September 2008 (UTC)

[edit] Link suggestions An automated Wikipedia link suggester has some possible wiki link suggestions for the Alloy article, and they have been placed on this page for your convenience. Tip: Some people find it helpful if these suggestions are shown on this talk page, rather than on another page. To do this, just add {{User:LinkBot/suggestions/Alloy}} to this page. — LinkBot 01:03, 18 Dec 2004 (UTC)

[edit] Compound? Looks like there is an inconsistence between alloy and chemical compound: -E3c2d6ec0ca59f4588b8bb5cb621cfa6 12:42, 27 Jan 2005 (UTC) Alloy: "An alloy is a combination, either in solution or compound, of two or more elements, [...]" Chemical compound: "This is why materials such as brass [...] or chocolate are considered mixtures or alloys rather than compounds."

[edit] Alloys moved to list of alloys I removed the list of alloys and added a link to List of alloys. (That had been missing!) I also checked whether the alloys I removed here were mentioned in List of alloys and added them there if necessary. Johan Lont 16:11, 21 December 2005 (UTC)

[edit] percentages ? When you say "58%" do you mean "by weight"? Of course. That's the way to deal with metals.74.249.77.168 (talk) 23:11, 19 September 2008 (UTC)

[edit] Is it possible to "undo" an alloy? Here is a question that I was wondering about: if one has 12 karat 10 gram gold alloy coin, is it possible to "undo" the alloy and extract 5 grams of 99.9999% gold out of it (it does not matter what the other 5 grams are)? • There is a patent for gold recovery process from jewelry alloys, but I am not sure who would do this for you. Of coure there are methods for separating the elements out of alloys, and it is done all the time - just as metals are separated out of their ores. By melting the whole solid alloy, it is usually found that the constitutents have different densities, and they will separate out into different layers of molten metals, one floating on top of the other. Then, you just pipe off the one that you want. The metals in an alloy can also be separated by electrolysis, and in the case of elements like the rare earth elements, by using ion-exchange resins. In the iron & steel industry, there are alloys of iron and carbon that have too much carbon in them. The carbon can be removed by blowing oxygen through molten iron in what is called the basic oxygen process. The oxygen combines with the carbon, and the carbon emerges as carbon dioxide.74.249.77.168 (talk) 23:21, 19 September 2008 (UTC) You have ten grams of high-grade gold ore. See Refining (metallurgy). —Ryan 14:20, 21 October 2007 (UTC) can you name some please name some modern alloys and some ancient ones? lol need help for assignment, Ryan —Preceding unsigned comment added by 121.208.57.230 (talk) 04:57, 25 September 2008 (UTC) No offense, but this is the wrong place to be asking these questions. Wikipedia:Reference desk will help you with questions like this. --Wizard191 (talk) 12:10, 25 September 2008 (UTC)

[edit] Proposed project There is evidently no extant WikiProject which deals with articles concerning alloys and other chemical compounds. This could be a problem, as many of these articles deal with what are considered to be generally important topics. To correct this situation, I have proposed a project to deal with these articles

at Wikipedia:WikiProject Council/Proposals#Chemical compounds and mixtures. Anyone interested in contributing to such a project should indicate as much there. Thank you for your attention. John Carter 20:33, 28 April 2007 (UTC)

[edit] Alloy numbering systems How do you look up the properties of specific alloys? I was trying to find information about the beryllium bronze Glucydur, and couldn't find much. I understand there is a Unified Numbering System for alloys used in North America. Are there any similar systems in use in Europe or Asia? --Chetvorno 20:55, 11 August 2007 (UTC)

[edit] Young's modulus Young's modulus isn't sensitive to small changes in alloy composition. It's also not appreciably affected by heat treatment or other processing. Young's modulus does not vary the way tensile strength does; it behaves more like density. Properties of various steels: • Properties of Steels and Cast Irons • Euro-inox Properties of Stainless Steels • Datum Alloys Properties of Stainless Steels The following source was used to support grouping Young's modulus with tensile strength and yield strength: • [1] Karl U. Kainer, (2003) Magnesium Alloys and Technology, Wiley Publishers, 293 pages ISBN 352730570X (note: URL seems to be borked, just search for the title on google books)

But this book discusses Young's modulus in the context of magnesium metal matrix composites. It's not really applicable to alloys. —Ryan 14:11, 21 October 2007 (UTC)

[edit] Redirect of 'Substitutional alloy' 'Substitutional alloy' redirects to this article. Maybe it should have its own article? WinterSpw (talk) 07:03, 3 December 2008 (UTC) Go for it! Wizard191 (talk) 14:07, 3 December 2008 (UTC) Retrieved from "http://en.wikipedia.org/wiki/Talk:Alloy"

Alloy From Wikipedia, the free encyclopedia

Jump to: navigation, search This article is about the material. For the specification language, see Alloy (specification language). For alloyed wheels, see alloy wheel.

Steel is a metal alloy whose major component is iron, with carbon content between 0.02% and 2.14% by mass. An alloy is a partial or complete solid solution of one or more elements in a metallic matrix. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may be homogeneous in distribution depending on thermal (heat treatment) history. Alloys usually have different properties from those of the component elements.

Contents [hide] • 1 Theory • 2 Termin ology • 3 See also • 4 Referen ces • 5 Externa l links

[edit] Theory Alloying one metal with other metal(s) or non metal(s) often enhances its properties. For instance, steel is stronger than iron, its primary element. The physical properties, such as density, reactivity, Young's modulus, and electrical and thermal conductivity, of an alloy may not differ greatly from those of its elements, but engineering properties, such as tensile strength[1] and shear strength may be substantially different from those of the constituent materials. This is sometimes due to the sizes of the atoms in the

alloy, since larger atoms exert a compressive force on neighboring atoms, and smaller atoms exert a tensile force on their neighbors, helping the alloy resist deformation. Alloys may exhibit marked differences in behavior even when small amounts of one element occur. For example, impurities in semi-conducting ferromagnetic alloys lead to different properties, as first predicted by White, Hogan, Suhl, Tian Abrie and Nakamura.[2][3] Some alloys are made by melting and mixing two or more metals. Brass is an alloy made from copper and zinc. Bronze, used for bearings, statues, ornaments and church bells, is an alloy of copper and tin. Unlike pure metals, most alloys do not have a single melting point. Instead, they have a melting range in which the material is a mixture of solid and liquid phases. The temperature at which melting begins is called the solidus and the temperature when melting is complete is called the liquidus. However, for most alloys there is a particular proportion of constituents (in rare cases two) which has a single melting point. This is called the alloy's eutectic mixture.

[edit] Terminology In practice, some alloys are used so predominantly with respect to their base metals that the name of the primary constituent is also used as the name of the alloy. For example, 14 karat gold is an alloy of gold with other elements. Similarly, the silver used in jewelry and the aluminium used as a structural building material are also alloys. The term "alloy" is sometimes used in everyday speech as a synonym for a particular alloy. For example, automobile wheels made of aluminium alloy are commonly referred to as simply "alloy wheels". The usage is obviously indefinite, since steels and most other metals in practical use are also alloys.

[edit] See also • • • •

List of alloys Intermetallics Heat treatment CALPHAD (method)

[edit] References 1. ^ Adelbert Phillo Mills, (1922) Materials of Construction: Their Manufacture and Properties, John Wiley & sons, inc, 489 pages, originally published by the University of Wisconsin, Madison 2. ^ C. Michael Hogan, (1969) Density of States of an Insulating Ferromagnetic Alloy Phys. Rev. 188, 870 - 874, [Issue 2 – December 1969] 3. ^ X. Y. Zhang and H. Suhl (1985) Phys. Rev. A 32, 2530 - 2533 (1985) [Issue 4 – October 1985

List of alloys From Wikipedia, the free encyclopedia Jump to: navigation, search This is an incomplete list of named alloys grouped alphabetically by base metal. Within these headings they are in no particular order. Some of the main alloying elements are optionally listed after the alloy names.

Contents [hide] • 1 Alloys of alumini um • 2 Alloys of bismuth • 3 Alloys of cobalt • 4 Alloys of copper • 5 Alloys of gallium • 6 Alloys of gold • 7 Alloys of indium • 8 Alloys of iron • 9 Alloys of lead • 10 Alloys of magnes ium • 11 Alloys of mercur y • 12 Alloys

[edit] Alloys of aluminium Main articles: Aluminium and Aluminium alloy • • • • • • • •

Al-Li (lithium) Alnico (aluminum, nickel, cobalt): used for permanent magnets Duralumin (copper) Nambe (aluminium plus seven other undisclosed metals) Silumin (silicon) AA-8000: used for building wire in the U.S. per the National Electrical Code Magnalium (5% magnesium)/used in airplane bodies, ladders,etc. Aluminium also forms complex metallic alloys, like β-Al-Mg, ξ'-Al-Pd-Mn, T-Al3Mn

[edit] Alloys of bismuth Main article: Bismuth • Wood's metal (lead, tin, cadmium) • Rose metal (lead, tin)

[edit] Alloys of cobalt Main article: Cobalt • Megallium • Stellite (chromium, tungsten, carbon) • Talonite • Ultimet (chromium, nickel, molybdenum, iron, tungsten) • Vitallium

[edit] Alloys of copper Main articles: Copper and Copper alloys • • • •

Arsenical copper Beryllium copper (beryllium) Billon (silver) Brass (zinc) • Calamine brass (zinc) • Chinese silver (zinc) • Dutch metal (zinc) • Gilding metal (zinc) • Muntz metal (zinc) • Pinchbeck (zinc) • Prince's metal (zinc) • Tombac (zinc) • Bronze (tin, aluminium or any other element) • Aluminium bronze (aluminium) • Arsenical bronze

• • • • • • • • • • • • • • • •

• Bell metal (tin) • Florentine bronze (aluminium or tin) • Guanín • Gunmetal (tin, zinc) • Glucydur • Phosphor bronze (tin and phosphorus) • Ormolu (Gilt Bronze) (zinc) • Speculum metal (tin) Constantan (nickel) Copper-tungsten (tungsten) Corinthian bronze (gold, silver) Cunife (nickel, iron) Cupronickel (nickel) Cymbal alloys (Bell metal) (tin) Devarda's alloy (aluminium, zinc) Electrum (gold,silver) Hepatizon (gold, silver) Heusler alloy (manganese, tin) Manganin (manganese, nickel) Molybdochalkos (lead) Nickel silver (nickel) Nordic gold (aluminium, zinc, tin) Shakudo (gold) Tumbaga (gold)

[edit] Alloys of gallium Main article: Gallium • Galinstan

[edit] Alloys of gold Main article: Gold The purity of alloys of gold is expressed in carats, which tell you the ratio of the minimum amount of gold (by mass) over 24 parts total. 24 carat gold is fine gold (24/24 parts), and the engineering standard is that it be applied to alloys that have been refined to 99.9% or better purity ("3 Nines Fine"). There are, however, places in the world that allow the claim of 24kt. to alloys with as little as 99.0% gold ("2 Nines Fine" or "Point Nine-nine Fine). An alloy which is 14 parts gold to 10 parts alloy is 14 carat gold, 18 parts gold to 6 parts alloy is 18 carat, etc. This is becoming more commonly and accurately expressed as the result of the ratio, ie: 14/24 equals .585 (rounded off), and 18/24 is .750 ("Seven-fifty Fine"). There are hundreds of possible alloys and mixtures possible, but in general the addition of silver will color gold green, and the addition of copper will color it red. A mix of around 50/50 copper and silver gives the range of yellow gold alloys the public is accustomed to seeing in the marketplace. • Electrum (silver, copper) • Tumbaga (copper)

• Rose gold (copper) • White gold (nickel, palladium)

[edit] Alloys of indium Main article: Indium • Field's metal (bismuth, tin)

[edit] Alloys of iron Main article: Iron See also: Category:Ferrous alloys • Steel (carbon) (Category:Steels) • Stainless steel (chromium, nickel) • AL-6XN • Alloy 20 • Celestrium • Marine grade stainless • Martensitic stainless steel • Surgical stainless steel (chromium, molybdenum, nickel) • Silicon steel (silicon) • Tool steel (tungsten or manganese) • Bulat steel • Chromoly (chromium, molybdenum) • Crucible steel • Damascus steel • HSLA steel • High speed steel • Maraging steel • Reynolds 531 • Wootz steel • Iron • Anthracite iron (carbon) • Cast iron (carbon) • Pig iron (carbon) • Wrought iron (carbon) • Fernico (nickel, cobalt) • Elinvar (nickel, chromium) • Invar (nickel) • Kovar (cobalt) • Spiegeleisen (manganese, carbon, silicon) • Ferroalloys (category:Ferroalloys) • Ferroboron • Ferrochrome • Ferromagnesium • Ferromanganese • Ferromolybdenum

• • • • •

Ferronickel Ferrophosphorus Ferrotitanium Ferrovanadium Ferrosilicon

[edit] Alloys of lead Main article: Lead • • • •

Molybdochalkos (copper) Solder (tin) Terne (tin) Type metal (tin, antimony)

[edit] Alloys of magnesium Main article: Magnesium • Magnox (aluminium) • T-Mg-Al-Zn (Bergman phase) is a complex metallic alloy • Elektron

[edit] Alloys of mercury Main article: Mercury (element) • Amalgam

[edit] Alloys of nickel Main article: Nickel • Category:Nickel alloys • • • • • • • • • • • • •

Alumel (nickel, manganese, aluminium, silicon) German silver (copper, zinc) Chromel (chromium) Hastelloy (molybdenum, chromium, sometimes tungsten) Inconel (chromium, iron) Monel metal (copper, iron, manganese) Nichrome (chromium) Nicrosil (chromium, silicon, magnesium) Nisil (silicon) Nitinol (titanium, shape memory alloy) Cupronickel (bronze, copper) Alnico (aluminium, cobalt; used in magnets) Soft magnetic alloys • Mu-metal (iron) • [Ni-C] (Nickel, Carbon)

[edit] Alloys of potassium Main article: Potassium • NaK (sodium) • KLi (lithium)

[edit] Rare earth alloys Main article: Rare earth element • Mischmetal (various rare earth elements)

[edit] Alloys of silver Main article: Silver • • • • • • • •

Billon Sterling silver (copper) Britannia silver (copper) Goloid (copper, gold) Electrum (gold) Argentium sterling silver (copper, germanium) Shibuichi (copper) Platinum sterling (platinum)

[edit] Alloys of titanium Main article: Titanium • Beta C (vanadium, chromium, others) • 6al-4v (aluminium, vanadium)

[edit] Alloys of tin Main article: Tin • Britannium (copper, antimony)[1] • Pewter (lead, copper) • Solder (lead, antimony)

[edit] Alloys of uranium Main article: Uranium • Staballoy (depleted uranium with other metals, usually titanium or molybdenum) • Uranium with plutonium, frequently found in nuclear reactors

[edit] Alloys of zinc Main article: Zinc • Zamak (aluminium, magnesium, copper) • Brass (copper)

[edit] Alloys of zirconium Main article: Zirconium • Zircaloy (tin) Retrieved from "http://en.wikipedia.org/wiki/List_of_alloys"