Kanthal (alloy): Difference between revisions
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m Have clarified that Kanthal is the trademark for a family of FeCrAl alloys and the brand for Sandvik's heating technology products. |
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Kanthal is the trademark for a family of iron-chromium-aluminium (FeCrAl) alloys used in a wide range of resistance and high-temperature applications. Kanthal FeCrAl alloys consist of mainly [[iron]], [[chromium]] (20–30 %) and [[aluminium]] (4–7.5 %). The first Kanthal FeCrAl alloy was developed by [[Hans von Kantzow]] in [[Hallstahammar]], [[Sweden]]. Its name is derived from ''Kant''zow and ''Hal''lstahammar. The alloys are known for their ability to withstand high temperatures and having intermediate electric resistance. As such, it is frequently used in [[heating element]]s. The trademark Kanthal is owned by Sandvik Intellectual Property. |
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For heating, resistance wire must be stable in air when hot. Kanthal |
For heating, resistance wire must be stable in air when hot. Kanthal FeCrAl alloy forms a protective layer of aluminum oxide ([[alumina]]). |
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<ref>http://www.sci-ed-ga.org/modules/materialscience/light/pdf/section_13.pdf |
<ref>http://www.sci-ed-ga.org/modules/materialscience/light/pdf/section_13.pdf |
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Advanced Topic: Oxidation Resistant Materials</ref> |
Advanced Topic: Oxidation Resistant Materials</ref> |
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Ordinary Kanthal has a melting point of {{convert|1200|°C|°F|abbr=on|lk=off}}. Special grades have a melting point as high as {{convert|1425|°C|°F|abbr=on|lk=off}}.<ref>{{Citation | inventor-last = Uemori | inventor-first = Susumu | inventor2-last = Aitani | inventor2-first = Takashi | issue-date = 2006-04-11 | title = Electric heater for a semiconductor processing apparatus | country-code = US | description = | patent-number = 7027722}}</ref> |
Ordinary Kanthal has a melting point of {{convert|1200|°C|°F|abbr=on|lk=off}}. Special grades have a melting point as high as {{convert|1425|°C|°F|abbr=on|lk=off}}.<ref>{{Citation | inventor-last = Uemori | inventor-first = Susumu | inventor2-last = Aitani | inventor2-first = Takashi | issue-date = 2006-04-11 | title = Electric heater for a semiconductor processing apparatus | country-code = US | description = | patent-number = 7027722}}</ref> |
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Kanthal is the name not only of |
Kanthal is the name not only of a family of alloys, it is also the brand name for Sandvik's heating technology products. |
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Kanthal used to be a name of a company ''AB Kanthal'' that was founded 1931. In the late 1990s Sandvik became majority shareholder in Kanthal. |
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== See also == |
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* [[Nichrome]] |
* [[Nichrome]] |
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* [[High temperature oxidation]] |
* [[High temperature oxidation]] |
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==External links== |
==External links== |
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* [http://www.kanthal.com |
* [http://www.kanthal.com The brand website for Kanthal products] |
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* [http://www.resistancewire.com/Html/techinfo.html Resistance wire technical information tables] |
* [http://www.resistancewire.com/Html/techinfo.html Resistance wire technical information tables] |
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Revision as of 14:56, 20 January 2011
Kanthal is the trademark for a family of iron-chromium-aluminium (FeCrAl) alloys used in a wide range of resistance and high-temperature applications. Kanthal FeCrAl alloys consist of mainly iron, chromium (20–30 %) and aluminium (4–7.5 %). The first Kanthal FeCrAl alloy was developed by Hans von Kantzow in Hallstahammar, Sweden. Its name is derived from Kantzow and Hallstahammar. The alloys are known for their ability to withstand high temperatures and having intermediate electric resistance. As such, it is frequently used in heating elements. The trademark Kanthal is owned by Sandvik Intellectual Property.
For heating, resistance wire must be stable in air when hot. Kanthal FeCrAl alloy forms a protective layer of aluminum oxide (alumina).
[1]
Aluminium oxide is an electrical insulator but has a relatively high thermal conductivity; special techniques may be required to make good electrical connections.
Ordinary Kanthal has a melting point of 1,200 °C (2,190 °F). Special grades have a melting point as high as 1,425 °C (2,597 °F).[2]
Kanthal is the name not only of a family of alloys, it is also the brand name for Sandvik's heating technology products. Kanthal used to be a name of a company AB Kanthal that was founded 1931. In the late 1990s Sandvik became majority shareholder in Kanthal.
References
- ^ http://www.sci-ed-ga.org/modules/materialscience/light/pdf/section_13.pdf Advanced Topic: Oxidation Resistant Materials
- ^ Electric heater for a semiconductor processing apparatus
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External links
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