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Ceramvar alloyPricision Alloy 4J33/4J34(YB/T5234-1993)*Ceramvar alloy, ASTM F1466, (Fe-Ni27-Co25), Chinese 4J33/4J34Main application:Match with the electricity vacuum industry with the ceramics to seal meets.Cross Reference:GradeRussiaU.S.A.JapanGermany4J3333Hk(Ni33Co17)-KV-4(Ni33Co17)-4J3431HK(Ni31Co20) 24HK(Ni25Co18)Ceramvar(Ni27Co25)-Vacon20(Ni28Co20)Grade & Chemical Composition ?(See Table 1) Table 1 Grade & Chemical CompositionGradeChemical Composition (%)CPSMnSiNiCoFe4J330.050.0200.0200.500.3032.1~33.614.0~15.2Balance4J340.050.0200.0200.500.3028.5~29.519.5~20.5BalanceNotes: 1.Under condition that the average coefficient of the linear expansion meets the requirements of the standard, the content of nickel and cobalt are allowed to deviate from the stated range. 2.The shape and dimensions of the alloys are in compliance with GB/T14985.Mechanical Properties (See Table 2 Table4) Table 2 Tensile Strength (for wires)SymbolStateTensile StrengthRAnnealed5851Unannealed860Table 3 Tensile Strength (for Strips)SymbolStateTensile Strength/MPaRAnnealed570lUnannealed700Table 4 Hardness of Deep Stamping StripsStateThicknessHardness HVDeep-Stamping2.51702.5165Physical Property (See Table 5 & Table 6) Table5 Linear Expansion CofficientGradeHeat treatment of the samplesMean Coefficient of Linear Expansion ?/(10-6/K)20~300 C20~400 C20~500 C20~600 C4J33Heat to 900 20 C in the protective atmosphere or in vacuum condition, hold for 1 hour, cooled to 200 C at a rate less than 5 C/h, and take out from the furnace.6.0~6.86.6~7.44J346.3~7.17.8~8.5Table 6 Typical Coefficient of Linear ExpansionGradeMean Coefficient of Linear Expansion at Different Temperature ?/(10-6/K)20~200 C20.300 C20~400 C20~500 C20~600 C4J337.16.56.37.18.54J347.56.96.66.98.3Note: The values in the tables are for reference only.Specification: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/TubeSize Range:1. Sheet---Thickness 0.1mm~3.5mm, width: 300mm,Condition: cold rolled, bright, bright annealed2. Plate---Thickness 3