Huona (Shanghai) New Material Co., Ltd.  

Product Name: 5um Karma Resistance Strip / Foil for Thin Film Resistor, 0.005mm Model NO.: Karma Powder: Not Powder Type: Nickel Strip Alloy: Alloy Purity: >99.95% Standard: GB, DIN, ASTM, AISI Application: Aviation, Electronics, Industrial, Medical, Chemical Chemical Composition: Ni 80% Product Name: Karma Foil Characteristics: High Resistivity, Good Oxidation Resistance The Highest Use Temperature: 1300c Density: 8.1g/cm3 Resisivity: 1.33 Trademark: HUONA Transport Package: Wooden Cases or Cartons Specification: 0.05mm Origin: Shanghai HS Code: 7505220000 Product Description 5um Karma resistance Strip / foil for Thin film resistor, T:0.005mm1. Karma alloyKarmaalloyismadeupofcopper,nickel,AluminumandIronasthemaincomponents.Theresistivityis2~3timeshigherthanMENTONG.Ithaslowertemperaturecoefficientofresistance(TCR),lowerthermalEMFversuscopper,goodpermanenceofresistanceforalongperiodoftimeandstronganti-oxidation.ItsworkingtemperaturerangeiswiderthanMENTONG(-60~300ºC).Itissuitableformakingfineprecisionresistanceelementsandstrain.2. KarmasizeWire:0.01mm-10mmRibbon:0.05*0.2mm-2.0*6.0mmStrip:0.5*5.0mm-5.0*250mm3.Karma Property namecode MainComposition(%)StandardCrAlFeNiKarma6J2219~212.5~3.22.0~3.0bal.JB/T5328NameCode(20ºC)Resisti vity(μΩ.m) (20ºC)Temp.Coeff.OfResistance(αX10-6/ºC)(0~100ºC)ThermalEMFvs.Copper(μv/ºC)Max.workin gTemp.(ºC)(%)Elongati on(N/mm2)TensileStrengthStandardKarma6J221.33±0.07≤±20≤2.5≤300>7≥780JB/T53284.DistinctivefeaturesofKarmaresistancewire1)StartingwithNickelChromiumelectricheatwireClass1,wereplacedsomeoftheNiwithAlandotherelements,andthusachievedaprecisionresistancematerialwithimprovedresistancetemperaturecoefficientandheatelectromotiveforceagainstcopper.WiththeadditionofAl,wehavesucceededinmakingvolumeresistivity1.2timesgreaterthanNickelChromiumelectricheatwireClass1andthetensilestrength1.3timesgreater.2)ThesecondarytemperaturecoefficientβofKarmalloywireKMWisverysmall,-0.03×10-6/K2,andtheresistancetemperaturecurveturnsouttobealmostastraightlinewithinawidetemperaturerange.Therefore,thetemperaturecoefficientissettobetheaveragetemperaturecoefficientbetween23~53°C,but1×10-6/K,theaveragetemperaturecoefficientbetween0~100°C,alsomaybeadoptedforthetemperaturecoefficient.3)Electromotiveforceagainstcopperbetween1~100°Cisalsosmall,below+2μV/K,andexhibitsexcellentstabilityoveraperiodofmanyyears.4)Ifthisistobeusedasaprecisionresistancematerial,lowtemperatureheattreatmentisrequiredtoeliminateprocessingdistortionsjustasinthecaseofManganinwireCMW.