
Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low-alloy steels and high-alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Dega...
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http://en.wikipedia.org/wiki/Alloy_steel

• Any steel containing a notable quantity of some other metal alloyed with the iron, usually chromium, nickel, manganese, tungsten, or vanadium.
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(from the article `materials science`) ...low-alloy (HSLA) steels, are intermediate in composition between carbon steels, whose properties are controlled mainly by the amount of carbon ...
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http://www.britannica.com/eb/a-z/a/50
Al'loy steel Any steel containing a notable quantity of some other metal alloyed with the iron, usually chromium, nickel, manganese, tungsten, or vanadium.
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http://www.encyclo.co.uk/webster/A/60

[
n] - steel who characteristics are determined by the addition of other elements in addition to carbon
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http://www.webdictionary.co.uk/definition.php?query=alloy%20steel

Steel containing substantial quantities of elements other than carbon and the commonly-accepted limited amounts of manganese, sulfur, silicon, and phosphorus. Addition of such alloying elements is usually for the purpose of increased hardness, strength or chemical resistance. The metals most commonly used for forming alloy steels are: nickel, chrom...
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
noun steel who characteristics are determined by the addition of other elements in addition to carbon
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https://www.encyclo.co.uk/local/20974

Steel containing one or more alloying element. Steel is classified as alloy when the maximum content of alloying elements exceeds one or more of the following
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https://www.encyclo.co.uk/local/22435

carbon steel to which various elements, as chromium, cobalt, copper, manganese, molybdenum, nickel, tungsten, or vanadium, have been added in sufficient amounts to obtain desirable physical and chemical properties.
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https://www.infoplease.com/dictionary/alloy-steel

Steel containing significant quantities of alloying elements other than carbon and the commonly accepted amounts of manganese, silicon, sulfur, and phosphorus.
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https://www.metaltek.com/resources/glossary/

Refers to steels made with deliberate additions of one or more alloying elements during steelmaking to enhance the properties of the steel. The most common alloying elements are Mn, Cr, Mo and Ni
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https://www.steelonthenet.com/files/glossary-5.html

Steel containing substantial quantities of elements other than carbon and the commonly-accepted limited amounts of manganese, sulfur, silicon, and phosphorus. Addition of such alloying elements is usually for the purpose of increased hardness, strength or chemical resistance. The metals most commonly used for forming alloy steels are: nickel, chrom...
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https://www.unifiedalloys.com/resources/glossary/

A steel containing more than one alloying element.
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https://www.westyorkssteel.com/technical-information/glossaryof-steel-terms
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