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high temperature ni70cr30 cr20ni80 nichrome wire resistance by factory1
Other Alloys, ni70cr30, cr20ni80
Shanghai Tankii Alloy Material Co., Ltd.
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Product Description high temperature ni70cr30 cr20ni80 nichrome wire resistance by factory heat resistance wire is a type of high resistance electrical wire. The wire resists the flow of electricity, and converts the electrical energy into heat. Nichrome, a non-magnetic alloy of nickel and chromium, is commonly used to make resistance wire because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.The high nickel content, in combination with the high chromium content let the scaling temperature can reach to 1250oCChrome Nickel wire was shaped by means of high speed automatic cooling machine of which the power capacity is controlled by computer, they are available as wire and ribbon(strip). nichrome wire resistance Product forms and size range Nichrome Alloy GradeCr20Ni80,Cr20Ni30,Cr15Ni60,Cr20Ni35,Cr20Ni40FormRound wire,Flat wire,Strip,Bar,Spring shaped wire, Wave shaped strip,Radiant tube heaterSizeWire: 0.030mm-10mmRibbon: 0.05*0.2mm-2.0*6.0mmStrip: 0.5*5.0mm-5.0*250mmfurnance spring wire according to customers requirement nichrome wire resistance Features and advantages1)The highest working temperature up to 1200 degree.2)higher strength than iron chromium aluminum under high temperature3)not easy to deform under high temperature4)good plasticity5)easy to repair,6)high emissivity,7)Non-magnetic8)strong corrosion resistance,9)long service life Uses of nichrome wireChrome nickel wire resistance is widely used for making electric heating elements in home appliances and industrial furnaces.,various electrical resistors and locomotive braking resistor, infrared equipment, liquefied gas infrared heat-resisting net, different kinds of igniting and radiating electrodes and voltage-regulating resistors for motors and so on in Metallurgical machinery nichrome wire resistance Main characteristicsTypeCr20Ni80Cr15Ni60Cr30Ni70Cr20Ni35Cr20Ni30 Main chemical compositionNiRest55.0~61.0Rest34.0~37.030.0~34.0Cr20.0~23.015.0~18.028.0~31.018.0~21.018.0~21.0Fe≤1Rest≤1RestRestMax Temperature(oC)12001150125011001100Resistance Temperature correction coefficient.(CT)1.09±0.051.11±0.051.18±0.051.04±0.051.06±0.05Melting point (oC)14001390138013901390Resistivityρ20oC(10-6Ω.m)800oC1.0081.0781.0281.1881.1731000oC1.0141.0951.0331.2191.2011200oC1.025 1.043 Fast life valueTem.(oC)11751100120010501050hour(h)≥110≥100≥110≥100≥100Specific gravity(g/cm3)8.408.28.17.907.90Elongation(%)≥25≥25≥20≥20≥20Thermal(kj/m.h.oC)60.345.245.243.843.8Specific heat(20oC)j/g.oC0.4400.4940.4610.5000.500Extend strength(20~1000oC)α*10-6oC18.017.017.119.019.0Tensile strength(kg/mm2)>85>85>85>85>85Repeatedly bending(F/R)>12>12>12>12>12MicrostructureAusteniticAusteniticAusteniticAusteniticAustenitic nichrome wire resistance NoticeResistance electric heating wire has strong antioxidant properties, but a variety of gases in furnaces such as air, carbon, sulfur, hydrogen and nitrogen atmosphere, still have a certain impact on it. Although these heating wires all have had antioxidant treatment, the transportation, winding, installation and other process will cause damage to a certain extent and reduce its service life. In order to extend the service life, customers need to do pre oxidation treatment before using. The method is to heat alloy elements which have installed completely in the dry air to the temperature (lower 100-200C than its maximum using temperature), heat preservation for 5 to 10 hours, then cooling slowly with furnace. Pictures of nichrome wire resistance
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