Resistance heating strip
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Heating Alloys for Electric Household Appliances

Copyright by Kanthal AB. May be reproduced only with proper acknowledgement of the source. Catalogue 1-A-4-3 Production: ReklamCenter 03057. Printed in Sweden by Primatryck, 2003-02.3000 This information, which may be subject to change, is offered solely for your consideration and should not be taken as warranty or representation for which we assume legal responsibility. It is not to be understood as permission or recommendation to practice a pat-ented invention without a license and the user should determine weather relevant patent exist. ® KANTHAL, NIKROTHAL, ALKROTHAL, SUPERTHAL,...

6 Kanlhal Appliance Alloys Handbook KANTHAL Advantages Higher maximum temprature in air KANTHAL A-1 has a maximum tempra驭ture of 1400 °C 2550 °F; NIKROTHAL 80 has a maximum temprature of 1200 °C 2190 °E Lower density The density of the KANTHAL alloys is lower than that of the NIKROTHAL alloys. This means that a greater number of 魩quivalent lments can be made from the same weight material. Higher resistivity The higher resistivity of KANTHAL alloys makes it possible to choose a material with larger cross-section, which improves the life of the 驩lment. This is particularly important for thin...

Kanthal Appliance Alloys Handbook 7 NIKROTHAL Advantages Better rsistance to sulphur In atmosphres contaminated with sulphuric compounds and in the pr騩sence of contaminations containing sulphur on the wire surͭface, KANTHAL alloys have better corrosion resistance in hot state. NiCr alloys are heavily attacked under such conditions. Weight savings with KANTHAL alloys The lower density and higher resistivity of KANTHAL alloys means that for a given power, less material is needed when using KANTHAL instead of NIKROTHAL alloys. The result is that in a great number of applications, substantial...

Kanthal Appliance Alloys Handbook g Copper-Nickel Alloys CUPROTHAL 49 (universally known as Constantan) is manufacturͩe! under close control from electrolytic Copper and pure Nickel. CUPROTHAL 49 has a number of spcial characteristics - some electrical» some mechanical which make il a remarkablv versatile alloy. For certain applications, its high sp闩cifie rsistance and negligible temp魩rature coefficient of rsistance are its most important attributes. For others, the fact tlit CUPROTHAL 49 offers good ductility, is easilv soldered and welded and has good r颩sistance to atmospheric corrosion...

10 Kanthal Appliance Alloys Handbook Coppcr-Nickcl alloys with racdium and low KANTHAL produces Copper-Nickel alloys with resistivities lower than those of CUPROTHAL 49 and MANGANINA 43. The main applications are in high current elecirical rsistances, heating cables, electric blankets, fuses, resistors but they are also used in many other applications. resistivity CUPROTHAL 30 resistivity 30 microhm-cm CUPROTHAL 15 resistivity 15 microhm-cm CUPROTHAL 10 resistivity 10 microhnvcm CUPROTHAL 05 resistivity 5 microhnvcm Diffrent resistors and potentiometers using KANTHAL alloys.

Kanthal Appliance Alloys Handbook 11 Product Varieties 1 Rod Thin wide Welded Extruded Straightened Wire Strip Ribbon Strip tubes tubes wire KANTHAL KANTHAL APM Օ Օ KANTHAL A-1 Օ Օ KANTHAL A Օ Օ KANTHAL D, DT Օ Օ KANTHAL AF ՕՕ Օ KANTHAL AE ՕՕ ALKROTHAL ՕՕ NIKROTHAL NIKROTHAL 80 ՕՕ NIKROTHAL 70 Օ Օ NIKROTHAL 60 Օ Օ NIKROTHAL 40 ՕՕ NIKROTHAL 20 KANTHAL/NiFe NIFETHAL 70 NIFETHAL 52 Copper-Nickel CUPROTHAL49 Օ Օ Օ MANGANINA CUPROTHAL30 CUPROTHAL 15 CUPROTHAL 10 CUPROTHAL05

Kanthal Appliance Alloys Handbook 15 3. Stranded Rsistance Heating Wire Recognising the need for more preciesly controlled stranded wire within the cable industry and working closely with our cable customers, Kanthal have developed a range of stranded resistance wires in the well known NIKROTHAL, KANTHAL and Nickel alloys. These alloys possess the optimum properties for high performance at elevated temperatures and in other adverse conditions where reliability and quality is of paramount consideration. Alloy Nominal composition, % Resistivity at 20°C Max. temp *) Ni Cr Fe Al Oth. n mm2 m 1...

16 Kanlhal Appliance Alloys Handbook Standard Stocked Material Strand size mm Alloy Strand diameter nominal mm Strand rsistance U/m Mler per Kilo (approx.) 10x0.544 NIKROTHAL 80 0.2344-0.2579 26 19x0.523 NIKROTHAL 80 2.67 0.2886 max. 30 KW 0.574 hULfOr^iTUAt on OC ofX U.doO KW0.45 NLI\HLH MAL OU 骣-/Q u .^/b max. 19X0.574 NIKROTHAL 80 2.87 25 1flx0.523 NIKROTHAL 60 0.297 max. 30 KW 0.574 1 v C\ Ci7A NirkAl O A7 A fۯOA" ma* 01 1VX wJJi *♦ 19x0.574 Ni Mn2% u.u^^o max. 0.0247 max. ci 22 19 X 0.610 KW0.71 Ni Mn2% 0.0208 max 19 KW = King Wire TTg Kanthal plant and head office in Hallstahammar,...

18 Kanthal Appliance Alloys Handbook. 4. Thin Wide Strip Wide and very thin strip has been intro-duced as an alternative to flattened wire, ribbon, to offer a wider choice of widths than what can be offered via wire flatten-ing. Kanthal has the ability to supply thin wide resistancestrip in the thickness range 0,04 to 0,1 mm in widths up to 275 mm produced through rolling and slitting to dimension. The alloys available in this product form are primarily the high performing FeCrAl types, like KANTHAL AF, as specified in the tech-nical section of this handbook. For a material with very high...

20 Kanthal Appliance Alloys I landbook 5. Design Factors Operating Life Oxidation properties The life of the rsistance heating alloy is dpendent on a number of factors, among the most important are: - Temp驩rature - Temprature cycling - Contamination - Alloy composition - Trace l驩ments and impurities - Wire diameter - Surface condition - Atmosphre - Mechanical stress - Method of rgulation Since th詨se are unique for each application it is difficult to give gͪnerai guidelines of life expectations. Recommandations on some of the important design factors are given below. Table 1 Relative...

Kanthal Appliance Alloys Handbook 21 Corrosion Rsistance Corrosive or potentially corrosive consti-tuents can considerably shorten wire life. Perspiring hands» mouniing or supponing materials or contamination can cause corrosion, Steam Steani shortens die wire life. This effect is more pronounced on NIKROTHAL alloys than on KANTHAL alloys. Halogens Halogens (fluorine, chlorine, bromine and iodine) severely actack ail high-temp魩rature alloys at fairly low tempratures. Sulphur In sulphurous atmosphres KANTHAL alloys have considerably better durabiltty than nickel-base alloys. KANTHAL is...