Invar 36 alloy
Invar 36 is an alloy consisting of 36% nickel and 64% iron. It has a low coefficient of expansion from cryogenic temperatures to about 260°C. Invar 36 also has good strength and toughness properties at both extremely low and extremely high temperatures. The alloy is used in cryogenic applications, such as in the transport of liquefied natural gas, as well as in applications where dimensional stability is required, such as in precision instruments and optical devices.
invar is an alloy of iron and nickel
invar metal
What is Invar 36 used for?
Invar 36, also known as FeNi36, is an iron-nickel alloy with a low coefficient of thermal expansion. Invar 36 is used in applications where dimensional stability is required, such as in precision instruments and clocks. It is also used in cryogenics and in vacuum chambers.
Invar 36 is an alloy that contains 36% nickel and 64% iron. It has a low coefficient of thermal expansion, meaning it expands very little when heated. This makes it ideal for applications where dimensional stability is important, such as in scientific instruments or precision machinery.
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super invar an alloy of iron and nickel
Invar Alloy Specifications
Normal composition%
| Ni | 35~37.0 | Fe | Bal. | Co | – | Si | ≤0.3 |
| Mo | – | Cu | – | Cr | – | Mn | 0.2~0.6 |
| C | ≤0.05 | P | ≤0.02 | S | ≤0.02 |
Typical Physical properties
| Density (g/cm3) | 8.1 |
| Electrical resistivity at 20ºC(Om*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
| θ/ºC | α1/10-6ºC-1 | θ/ºC | α1/10-6ºC-1 |
| 20~-60 | 1.8 | 20~250 | 3.6 |
| 20~-40 | 1.8 | 20~300 | 5.2 |
| 20~-20 | 1.6 | 20~350 | 6.5 |
| 20~-0 | 1.6 | 20~400 | 7.8 |
| 20~50 | 1.1 | 20~450 | 8.9 |
| 20~100 | 1.4 | 20~500 | 9.7 |
| 20~150 | 1.9 | 20~550 | 10.4 |
| 20~200 | 2.5 | 20~600 | 11.0 |
Typical Mechanical properties
| Tensile Strength | Elongation |
| Mpa | % |
| 641 | 14 |
| 689 | 9 |
| 731 | 8 |
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. |
| Precautions | 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
| Alloys Name | Type | Dimension | ||
| OhmAlloy-4J36 | Wire | D= 0.1~8mm | ||
| OhmAlloy-4J36 | Strip | W= 5~250mm | T= 0.1mm | |
| OhmAlloy-4J36 | Foil | W= 10~100mm | T= 0.01~0.1mm | |
| OhmAlloy-4J36 | Bar | Dia= 8~100mm | L= 50~1000 | |
1.3912 invar
invar heat treatment
Invar Alloy Specifications
Alloy Type | Trade Name | UNS No. | GER Grade | FR Grade | Sdandard | Forms Of Supply | |||
Rod | Strip | Wire | Sheet | ||||||
Ni29Co17 | Kovar | K94610 | Vacon 12 | Dilver Pₒ | ASTM F15 | √ | √ | √ | √ |
FeNi36 | Invar 36 | K93603 | Vacodil 36 | Invar Standard | ASTM 1684 | √ | √ | √ | √ |
FeNi42 | Alloy 42 | K94100 | Vacodil 42 | N 42 | ASTM F30 | √ | √ | √ | √ |
FeNi48 | Alloy 48 | K94800 | — | — | ASTM F30 | √ | √ | √ | √ |
Ni33Co17 | — | — | — | — | — | √ | √ | √ | √ |
Density (g/cm3) | Resistivity at 20℃(Ωmm2/m) | Thermal conductivity, λ/ W/(m*℃) | Curie point (Tc/ ℃) | Elastic Modulus (E/ Gpa) |
8.1 | 0.78 | 11 | 230 | 144 |
Tensile strength(Mpa) | Elongation(%) |
641 | 14 |
689 | 9 |
731 | 8 |
θ/℃ | α1/10-6℃-1 | θ/℃ | α1/10-6℃-1 |
20~-60 | 1.8 | 20~250 | 3.6 |
20~-40 | 1.8 | 20~300 | 5.2 |
20~-20 | 1.6 | 20~350 | 6.5 |
20~-0 | 1.6 | 20~400 | 7.8 |
20~50 | 1.1 | 20~450 | 8.9 |
20~100 | 1.4 | 20~500 | 9.7 |
20~150 | 1.9 | 20~550 | 10.4 |
20~200 | 2.5 | 20~600 | 11.0 |
temperature range,℃ | 20~50 | 20~100 | 20~200 | 20~300 | 20~400 |
aR/ 103 *℃ | 1.8 | 1.7 | 1.4 | 1.2 | 1.0 |
Form | Specification | |
Wire | Diameter=0.025mm~8mm | |
Flat wire | Width=0.4~40mm | Thick=0.03~2.9mm |
Strip | width=8~250mm | ThickT=0.1~3.0mm |
Foil | width=6~120mm | Thick=0.003~0.1mm |
Bar | Diameter=8~100mm | Long=50~1000 |
material invar 36
price of invar
Heat Treatment Process
Stress relief annealing | Heat to 530~550℃, keep for 1~2 h. Cool in the furnace |
annealing | Heating to 830~880℃ ,keep holding for 30 min. Furnace cooling |
Stabilization | (1) Heat to 830 ℃ in a protective atmosphere, hold for 20min. ~ 1h, quench (2)Temper |
Precautions | (1) The alloy cannot be hardened by heat treatment (2)Surface treatment can be sandblasted, polished and pickled |
alloy of invar
invar material
Applications of Invar Alloy
Invar, also known generically as FeNi36 (64Feni in the United States), is a nickel-iron alloy that is noted for its unique low coefficient of thermal expansion (CTE, or A) of invar. Alloy 36 (Invar(r)*) is a 36% nickel-iron alloy which shows nearly zero rate of thermal expansion–about a tenth that of carbon steel–at temperatures ranging from about -100degC up to 200degC. The second alloy – Carpenter Technology Super Invar32-5 – is a cobalt-iron-nickel alloy that exhibits about one-half of the heat of Carpenter Technologys Invar36(r) alloy at or near room temperature.
invar steel
invar 36 material
Why do we use Invar?
Is invar magnetic?
Yes, invar is magnetic. This alloy contains iron and nickel, which are both ferromagnetic materials. However, the overall magnetism of invar is fairly low due to the presence of other non-magnetic elements in the alloy.
super invar
astm f1684
What are the properties of invar?
Invar, also known as FeNi36, is a nickel-iron alloy that has a low coefficient of expansion over a wide range of temperatures. Invar is used in applications where dimensional stability is required, such as in precision instruments and clocks.
Some of the key properties of Invar include:
– Low coefficient of expansion: Invar has a very low thermal expansion coefficient (CTE or α) over a wide temperature range. This means that it maintains its size and shape better than other materials when exposed to changing temperatures.
– Good strength and hardness: Invar is a strong and hard material, making it resistant to deformation.
– Good electrical and thermal conductivity: Invar has good electrical and thermal conductivity, making it suitable for use in electrical and heat-transfer applications.
– Good weldability: Invar can be easily welded using standard welding techniques.
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invar rod
Can Invar be welded?
Invar can be welded, but it is not an easy process. In order to weld Invar, a welder must have a great deal of experience and skill. Invar is a difficult material to weld because it is very hard and brittle. When welding Invar, the welder must be very careful not to overheat the material, as this can cause the material to crack.
invar welding
alloy invar
Where can I buy Invar 36 round bars from?
If you’re in the market for Invar 36 round bars, you have a few different options for where to buy them. You can purchase them from a metal supplier, an online retailer, or directly from a manufacturer.
Metal suppliers typically have a wide range of metals available for purchase, including Invar 36. Some metal suppliers may only sell in bulk quantities, so if you’re only looking for a small amount of Invar 36, this may not be the best option for you.
Online retailers typically have a more limited selection of metals available for purchase, but they often sell smaller quantities than metal suppliers. This can be a good option if you’re looking for Invar 36 round bars but don’t need a huge amount.
Directly purchasing from a manufacturer can be a good option if you know exactly what you’re looking for and don’t mind paying slightly higher prices. You’ll usually be able to find exactly what you need from the manufacturer, and they may also offer custom sizes or shapes if you need something specific.
Where are Invar 36 round bars available?
Invar 36 round bars are available from a variety of suppliers. A quick search online will reveal a number of options. Invar 36 is a popular material for applications requiring low thermal expansion, such as in precision instruments and optical devices. It is also often used in cryogenics.
invar 36 material equivalent
invar manufacturing
In many environments, Invar 36 indeed has heat characteristics that are equivalent to glass, causing people to use Invar for various optical instruments. An alloy that has nearly constant dimensions and dimensional stability over the long-term, like Invar 36, is of extreme importance in such complex devices.
Invar is available as an smelter or as an annealed billet. Magellan Metals offers quick turnaround times on customers inquiries and specializes in the expedited supply of both large and small quantities of metal materials with the Invar(r) Nickel-Iron Alloy. Magellan Metals Invar(r) Nickel-Iron alloys are offered in various grades including Invar(r)36 and Invar(r)42 grades to meet the requirements for high-performance applications. Nickel alloys start losing tensile strength before reaching their melting temperature, so generally, application temperatures are recommended to stay well below those ranges. At Magellan Metals, we can provide one-off items or complete invoices for any of our Invar (r) 36 and Invar (r) 42 alloy materials.
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invar 1.3912
Discovery and Nobel Prize When a nickel-iron alloy was discovered in 1896, its unique properties of low, linear expansion across a broad temperature range allowed for effective bimetals that could be used in gas-cooker and safety-cutting devices.
Invar is a 36% nickel-iron alloy that has the lowest thermal expansion among all metals and alloys over the range of room temperature up to about 230degC.
invar 36 heat treatment
1.3912 invar 36
Invar 36 FAQ
Invar 36 is an alloy of iron, nickel and cobalt. It has a low coefficient of thermal expansion, meaning it expands very little when heated. This makes Invar 36 ideal for applications where dimensional stability is important, such as in telescopes and surveying equipment.
Invar 36 is also used in cryogenic applications, as it remains strong and tough at low temperatures. It is commonly used to make cryogenic tank heads and vessels, as well as pipes and valves for liquefied natural gas (LNG) systems.
What are the properties of Invar 36?
Invar 36 has a low coefficient of thermal expansion and is strong and tough at low temperatures. It is also corrosion resistant.
What are the applications of Invar 36?
Invar 36 is used in applications where dimensional stability is important, such as in telescopes, surveying equipment and cryogenic systems. It is also used to make cryogenic tank heads and vessels, as well as pipes and valves for liquefied natural gas (LNG) systems.
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