Nichrome Wire, Nicr 80/20, Nichrome Heating Wire manufacturer / supplier in China, offering Nichrome 80 Nichrome Heating Wire, 24AWG PTFE Insulated K Type Thermocouple Extension Wire with White and Green Color Code, IEC 60584-3 Thermocouple Cable 7*0.2mm with White and Green Rubber Insulation and so on.
Min. Order / Reference FOB Price | |
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30 kg | US $20.00/ kg |
Local Area: | Baoshan, Yunnan, China |
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R&D Capacity: | OEM, ODM, Other |
Payment Terms: | LC, T/T, PayPal |
Classification: | Feni36 |
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Density: | 8.1 |
Resisivity: | 0.78 |
Invar Standard Invar Alloy Strip 36ni
(Common Name: Invar, FeNi36, Invar Standard, Vacodil36)
4J36 (Invar), also known generically as FeNi36 (64FeNi in the US), is a nickel-iron alloy notable for its uniquely low coefficient of thermal expansion (CTE or α).
4J36 (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 Level staff (leveling rod) used is 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.
4J36 use oxyacetylene welding, electric arc welding, welding and other welding methods. Since the coefficient of expansion and chemical composition of the alloy is related should be avoided due to welding causes a change in the alloy composition, it is preferable to use Argon arc welding welding filler metals preferably contains 0.5% to 1.5% titanium, in order to reduce weld porosity and crack.
Normal composition%
Ni35~37.0FeBal.Co-Si≤0.3Mo-Cu-Cr-Mn0.2~0.6C≤0.05P≤0.02S≤0.02Coefficient of expansion
θ/ºCα1/10-6ºC-1θ/ºCα1/10-6ºC-120~-601.820~2503.620~-401.820~3005.2Physical Measuring Meter 20~-201.620~3506.520~-01.620~4007.820~501.120~4508.920~1001.420~5009.720~1501.920~55010.420~2002.520~60011.0Typical Physical propertiesDensity (g/cm3)8.1ElectrHydraulic Press ical resistivity at 20ºC(OMmm2/m)0.78Temperature factor of resistivity(20ºC~200ºC)X10-6/ºC3.7~3.9Thermal conductivity, λ/ W/(m*ºC)11Curie pointTc/ºC230Elastic Modulus,E/ Gpa144The 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 heateLCD Module d 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 surfaceTypical Mechanical properties
Tensile StrengthElongationMpa%6411468997318Temperature factor of resistivity
Temperature range, ºC20~5020~10020~20020~30020~400aR/ 103*ºC1.81.71.41.21.0