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FeNi 4J36 Strip Low Expansion Alloys Sandblasting

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FeNi 4J36 Strip Low Expansion Alloys Sandblasting

FeNi 4J36 Strip Low Expansion Alloys Sandblasting
FeNi 4J36 Strip Low Expansion Alloys Sandblasting FeNi 4J36 Strip Low Expansion Alloys Sandblasting FeNi 4J36 Strip Low Expansion Alloys Sandblasting

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Product Details:

Place of Origin: China
Brand Name: Ohmalloy
Certification: ISO CE
Model Number: Invar 36

Payment & Shipping Terms:

Minimum Order Quantity: 100kg
Packaging Details: coil
Delivery Time: 15 workdays
Payment Terms: L/C, T/T, Western Union
Supply Ability: 10000kg/week
Detailed Product Description
Material: FeNi Chemical: Fe64% Ni36%
Density: 8.1g/cm3 Surface: Bright &smooth
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4J36 Strip Low Expansion Alloys


Bright Low Expansion Alloys


FeNi Low Expansion Alloys

4J36 strip invar 36 alloy Low Expansion alloys for television shadow-mask frames



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).

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.


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 20℃(Ωmm2/m) 0.78
Temperature factor of resistivity(20℃~200℃)X10-6/℃ 3.7~3.9
Thermal conductivity, λ/ W/(m*℃) 11
Curie pointTc/ ℃ 230
Elastic Modulus, E/ Gpa 144


Coefficient of expansion

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


Typical Mechanical properties

Tensile Strength Elongation
Mpa %
641 14
689 9
731 8


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
  1. In protective media and heated to 830 ℃, hold 20min. ~ 1h, quench
  2. Due to the stress generated by quenching, heated to 315℃,hold 1~4h.
  1. Cannot be hardened by heat treatment
  2. Surface treatment can be sandblasting, polishing or pickling.
  3. Alloy can be used 25% hydrochloric acid pickling solution at 70 ℃ 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= 0.01~0.1
OhmAlloy-4J36 Bar Dia=8~100mm L=50~1000


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