Expansion Alloy Invar/4j36 Plate

Product Details
Customization: Available
Classification: Rare Metal
Feature: Low Coefficient of Thermal Expansion
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Number of Employees
15
Year of Establishment
2012-02-06
  • Expansion Alloy Invar/4j36 Plate
  • Expansion Alloy Invar/4j36 Plate
  • Expansion Alloy Invar/4j36 Plate
  • Expansion Alloy Invar/4j36 Plate
  • Expansion Alloy Invar/4j36 Plate
  • Expansion Alloy Invar/4j36 Plate
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Basic Info.

Model NO.
Invar/4J36
Surface Treatment
Smooth and Bright
Density
8.1g/cm3
Other Common Name
Invar, Feni36, Vacodil36, Niinvar
Transport Package
Standard Seaworthy Package(Wooden Boxes Package
Specification
ASTM/ASME/AISI/GB/DIN
Trademark
Ualloy
Origin
Zhejiang, China
HS Code
75052100
Production Capacity
500tons/Year

Product Description

Low thermal expansion coefficient Invar 36 Bar(Ni36Fe,Fe-36Ni,NiInvar)

(Common Name: Invar, FeNi36, Invar Standard, Vacodil36,AFNOR NF A54-301,ASTM F 1684-06,EN 1.3912
UNS K93600, UNS K93603,Werkstoff 1.3912)

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.
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(ohm 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
  1. In protective media and heated to 830 ºC, hold 20min. ~ 1h, quench
  2. Due to the stress generated by quenching, heated to 315ºC,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 ºC to clear oxidized surface

Style of supply
Alloys Name Type Dimension  
4J36 Wire D= 0.1~8mm  
4J36 Strip W= 5~250mm T= 0.1mm
4J36 Foil W= 10~100mm T= 0.01~0.1
4J36 Bar Dia= 8~100mm L= 50~1000
         

Expansion Alloy Invar/4j36 Plate

Package:All the bar will be packed into wooden case.
Expansion Alloy Invar/4j36 Plate


 

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