| Customization: | Available |
|---|---|
| Application: | Aviation, Electronics, Industrial, Medical, Chemical, Making Hermetic Seals |
| Standard: | JIS, GB, DIN, BS, ASTM, AISI |
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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
| Element | Min | Max |
| Carbon | -- | 0.05 max |
| Nickel | -- | 41.0 |
| Iron | Balance | |
| Silicon | -- | 0.20 |
| Manganese | -- | 0.40 |
| Temperature Range | Total Expansion | Mean Linear Coefficient | ||
|---|---|---|---|---|
| °C | °F | 10-3 | 10-6/°C | 10-6/°F |
| 20-100 | 68-212 | 0.42 | 5.3 | 2.9 |
| 20-150 | 68-302 | 0.69 | 5.3 | 2.9 |
| 20-200 | 68-392 | 0.95 | 5.3 | 2.9 |
| 20-250 | 68-482 | 1.22 | 5.3 | 2.9 |
| 20-300 | 68-572 | 1.48 | 5.3 | 2.9 |
| 20-350 | 68-662 | 1.80 | 5.4 | 3.0 |
| 20-400 | 68-752 | 2.36 | 6.2 | 3.4 |
| 20-450 | 68-842 | 3.05 | 7.1 | 3.9 |
| 20-500 | 68-932 | 3.84 | 8.0 | 4.4 |
| 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 |
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| Precautions |
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Elastic alloys include high elastic alloys and constant elastic alloys. It is used to make elastic elements such as elastic sensitive elements, energy storage elements and frequency elements in precision instruments.3J01,3J21,3J53Expansion alloys(Invar Alloy) are divided into Kovar alloys, ceramic sealing alloys, low expansion alloys, and constant expansion alloys. Widely used in electronic industry, precision measuring tools, precision instruments and low temperature engineering and other fields.4J28,4J29,4J32,4J33,4J36,4J40,4J42,4J50Our company Principle is " Quality first, Customer first".
CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got Iso9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel-based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, precision alloy, FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.
What is your working time?
Monday-Friday : 8:30AM-17:00PM (Beijing time, GMT+08.00)
We have public holiday during May.1-3, Oct.1-7 and Chinese New Year holiday . Pls e-mail us during our holiday if u have any questions.
Do you provide free samples?
Yes, we can provide a free sample for testing,buyer should bear the shipping costs.
What is your payment terms?
T/T,L/C,D/A,D/P,Western Union,MoneyGram,Paypal
What is the lead time?
Usually sample lead time is 15 days after payment has been confirmed.
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