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Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color

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Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color

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Large Image :  Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color Get Best Price

Product Details:
Place of Origin: China(Shanghai)
Brand Name: OHMALLOY
Certification: ISO
Model Number: 4J36
Payment & Shipping Terms:
Minimum Order Quantity: 20kg
Price: negotiable
Packaging Details: in coil
Supply Ability: 5000kg/month
Detailed Product Description
Material: Expansion Alloy Surface: Bright
Color: Oxidization
High Light:

invar alloy


thermal expansion invar

Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy.
Ohmalloy Material Co.,Ltd have a full production line from melting, surface cleaning, rolling and slitting, full set of testing machine and can meet all kinds of technical requirement from customer. Our product is widely used in heating equipment, big steel mill, mineral, electrical equipment, food machinery, auto industry, aerospace industry. Our product not only is popular in domestic market, but also been exported to all over the world.
Our company aims to be the best-quality alloy producer in the world. We insist on developing the more advanced alloy strip technology, to serve all the customer, improve people’s living level, make a more green earth in the future
Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color 0Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color 1Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color 2Standard Invar 36 Alloy Low Expansion Alloys Nikon - Iron Alloy Oxidation Color 3
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.

Normal composition%



Typical Physical properties

Density (g/cm3)8.1
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/ Gpa144

Coefficient of expansion



Typical Mechanical properties

Tensile StrengthElongation

Temperature factor of resistivity

Temperature range, ℃20~5020~10020~20020~30020~400
aR/ 103 *℃


The heat treatment process
Annealing for stress reliefHeated to 530~550℃ and hold 1~2 h. Cold down
annealingIn 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
  • In protective media and heated to 830 ℃, hold 20min. ~ 1h, quench
  • Due to the stress generated by quenching, heated to 315℃,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 ℃ to clear oxidized surface

Style of supply

Alloys NameTypeDimension
OhmAlloy-4J36WireD= 0.1~8mm
OhmAlloy-4J36StripW= 5~250mmT= 0.1mm
OhmAlloy-4J36FoilW= 10~100mmT= 0.01~0.1
OhmAlloy-4J36BarDia= 8~100mmL= 50~1000





Contact Details
Ohmalloy Material Co.,Ltd

Contact Person: Mr. Qiu

Tel: +8613795230939

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