Bright Invar 36 Strip (0.2mmx110mm) for Radio Element
Model No.: OhmAlloy-4J36
(Common Name: Invar, FeNi36, Invar Standard, Vacodil36)
OhmAlloy-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).
The name Invar comes from the word invariable, referring to its relative lack of expansion or contraction with temperature changes.
It was invented in 1896 by Swiss physicist Charles Édouard Guillaume. He received the Nobel Prize in Physics in 1920 for this discovery, which enabled improvements in scientific instruments.
OhmAlloy-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.
Typical Physical properties
|Electrical resistivity at 20ºC(mm2/m)||0.78|
|Temperature factor of resistivity(20ºC~200ºC)X10-6/ºC||3.7~3.9|
|Thermal conductivity, λ/ W/(m*ºC)||11|
|Curie point Tc/ ºC||230|
|Elastic Modulus, E/ Gpa||144|
Coefficient of expansion
Typical Mechanical properties
Temperature factor of resistivity
|Temperature range, ºC||20~50||20~100||20~200||20~300||20~400|
|aR/ 103 *ºC||1.8||1.7||1.4||1.2||1.0|
|The heat treatment process|
|Annealing for stress relief||Heated to 530~550ºC and hold 1~2 h. Cold down|
|annealing||In 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 process|| |
In protective media and heated to 830 ºC, hold 20min. ~ 1h, quench
Due to the stress generated by quenching, heated to 315ºC,hold 1~4h.
Can not be hardened by heat treatment
Surface treatment can be sandblasting, polishing or pickling.
Alloy can be used 25% hydrochloric acid pickling solution at 70 ºC to clear oxidized surface
Style of supply
|OhmAlloy-4J36||Strip||W= 5~250mm||T= 0.1mm|
|OhmAlloy-4J36||Foil||W= 10~100mm||T= 0.01~0.1|
|OhmAlloy-4J36||Bar||Dia= 8~100mm||L= 50~1000|
Good luck to you! Contact us if you need more details on Invar 36 Strip. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Radio Element、Invar Strip. If these products fail to match your need, please contact us and we would like to provide relevant information.
Premium Related Products