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|Color:||Primary Color||Surface:||Bright And Smooth|
thermal expansion invar
OhmAlloy-4J36 (Expansion alloy)
(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).
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.
OhmAlloy-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.
4J36 MATERIAL DETAIL:https://www.youtube.com/watch?v=Pdv3prZiy38
|Electrical resistivity at 20℃(Ωmm2/m)||0.78|
|Temperature factor of resistivity(20℃~200℃)X10-6/℃||3.7~3.9|
|Thermal conductivity, λ/ W/(m*℃)||11|
|Curie point Tc/ ℃||230|
|Elastic Modulus, E/ Gpa||144|
Coefficient of expansion
Temperature factor of resistivity
|Temperature range, ℃||20~50||20~100||20~200||20~300||20~400|
|aR/ 103 *℃||1.8||1.7||1.4||1.2||1.0|
|The heat treatment process|
|Annealing for stress relief||Heated to 530~550℃ 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 830~880℃ in vacuum,hold 30 min.|
|The stabilization process||
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|
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want.
If we do not have, for spool wire, we can produce 1 spool, about 2-3kg. For coil wire, 25kg.
2. How can you pay for small sample amount?
We have Western union account, wire transfer for sample amount also ok.
3. Customer do not have express account. How will we arrange the delivery for sample order?
Just need to provide your address information, we will check the express cost, you can arrange the express cost together with sample value.
4. What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery and total amount. Let's talk more in details after getting your detailed requirements.
5. Do you provide free samples?
If you want several meters and we have stock of your size, we can provide, customer need to bear the International express cost.
6.How do you guarantee the quality?
We have QC who are responsible for tracking and monitoring whole production process, and we are willing to accept customer‘s testing.
7. What's our working time?
We will give you reply through email/phone Online chat tool within 24 hours. No matter working day or holidays.