Vacodil36 Invar Low Expansion Alloy Plate¹

Product Description Vacodil36 Invar Low Expansion Alloy plateClassification : low coefficient of thermal expansion alloyApplication: Invar is used where high dimensional stability is required, such as precision instruments, clocks, seismic creep gauges, television shadow-mask frames, valves in motors, and antimagnetic watches. In land surveying, when first-order (high-precision) elevation leveling is to be performed, the leveling rods used are made of Invar, instead of wood, fiberglass, or other metals. Invar struts were used in some pistons to limit their thermal expansion inside their cylinders.Chemical Composition in %, Invar Ni35-37%Fe.C0.05%Si0.3%Mn0,3-0,6 %So 0.015%P0.015%Mo0.1%V0.1%Al0.1%Cu0.1%Cr0,15 %  Basic physical constants and mechanical properties of the alloy:Density: γ = 8,1 g / cm3;Electric resistivity: ρ = 0,78 ohm mm2 ? / m;The temperature of the Curie point: Θs = 230 ° C;Modulus of elasticity E = 144 kN / mm2;Linear expansion coefficient a1 (20-100 oC) ≤1,5 * 10-6 oC -1  Temperature Range/oC1/10-6oC-1Temperature Range/oC1/10-6oC-120~-601.820~2503.620~-401.820~3005.220~-201.620~3506.520~01.620~4007.820~501.120~4508.920~1001.420~5009.720~1501.920~55010.420~2002.520~60011Typical Mechanical propertiesTensile StrengthElongationMpa%6411468997318 Temperature factor of resistivityTemperature range, oC20~5020~10020~20020~30020~400aR/ 103 *oC1.81.71.41.21.0 The heat treatment processAnnealing for stress reliefHeated to 530~550oC and hold 1~2 h. Cold downannealingIn order to eliminate hardening, which be bring out in cold-rolled, cold drawing process. Annealing needs heated to 830~880oC in vacuum,hold 30 min.The stabilization processIn protective media and heated to 830 oC, hold 20min. ~ 1h, quenchDue to the stress generated by quenching, heated to 315oC,hold 1~4h.PrecautionsCan not be hardened by heat treatmentSurface treatment can be sandblasting, polishing or pickling.Alloy can be used 25% hydrochloric acid pickling solution at 70 oC to clear oxidized surface All offered "Huona(Shanghai) New Material Co., Ltd" of rolled metal products Invar differs guaranteed high quality. Customers can buy Invar alloy for the production of different types of products and rely on the high-speed supply of rolled metal. 

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