Low Expansion Ferro Nickel Alloy Invar 36 Bar Round Rods FeNi36 /4J36

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Model Number:BLM-S
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High Quality Low Expansion Ferro Nickel Alloy FeNi36 /4J36 Round Rods Invar 36 Bar


1 . Description

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.


2 . 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



3 . 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/ Gpa

144


4 . 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


5 . Pictures

China Low Expansion Ferro Nickel Alloy Invar 36 Bar Round Rods FeNi36 /4J36 supplier

Low Expansion Ferro Nickel Alloy Invar 36 Bar Round Rods FeNi36 /4J36

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