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Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications
Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications
Specifications
Brand Name :
OHMALLOY
Model Number :
4J36
Certification :
ISO,SGS
Place of Origin :
China(Shanghai)
MOQ :
20kg
Price :
negotiable
Payment Terms :
L/C, T/T, , MoneyGram
Supply Ability :
5000kg/month
Packaging Details :
with wooden box
Material :
4J36
Supply Type :
Plate
Color :
Primary Color
Surface :
Bright and Smooth
Description

Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications

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 point Tc/ ℃ 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

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.
Precautions

1) Can not 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

What is the difference between Inconel and Invar 36?

The choice between the two should be based on the specific requirements of the particular application. Inwar is suitable for applications that require a low coefficient of thermal expansion. On the other hand, Conel is a perfect application that requires high strength and heat resistance.

Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications
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Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications
Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications

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Product Detail
Brand Name :
OHMALLOY
Model Number :
4J36
Certification :
ISO,SGS
Place of Origin :
China(Shanghai)
MOQ :
20kg
Price :
negotiable
Contact Supplier
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Near-Zero CTE Invar 4J36 Plate (UNS K93600)Precision Metrology and Cryogenic Applications

Ohmalloy Material Co.,Ltd

Verified Supplier
10 Years
shanghai, shanghai
Since 2008
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter, Trading Company
Main Products :
FeCrAl Alloy, Nickel Strip, Bimetallic Strip
Total Annual :
4000000-6000000
Employee Number :
20~50
Certification Level :
Verified Supplier
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