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Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co.,Ltd
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Invar 36 Nickel Iron Alloy Tubes with High Dimensional Stability and Corrosion Resistance for Precision Instruments

Détails de produit

Lieu d'origine: Shanghai, Chine

Nom de marque: TANKII

Certification: ISO9001, SGS

Numéro de modèle: invar36

Conditions de paiement et d'expédition

Quantité de commande min: 10 kg

Prix: Négociable

Détails d'emballage: caisse en bois

Délai de livraison: 7-20 jours

Conditions de paiement: LC, T/T, Western Union

Capacité d'approvisionnement: 100 tonnes par mois

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Les spécifications
Mettre en évidence:

Invar 36 nickel iron alloy tubes

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Invar36 pipes for green buildings

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precision alloy Invar 36 tubes

Numéro de modèle.:
Invar 36
DO:
0,20 mm minimum
POIDS:
0.015 mm
Longueur:
0,20 mm minimum.
Forme:
tuyau en serpentin ; Tuyau capillaire Tuyaux sans soudure
Surface:
Surface brillante
Échantillon:
petite commande acceptée
Numéro de modèle.:
Invar 36
DO:
0,20 mm minimum
POIDS:
0.015 mm
Longueur:
0,20 mm minimum.
Forme:
tuyau en serpentin ; Tuyau capillaire Tuyaux sans soudure
Surface:
Surface brillante
Échantillon:
petite commande acceptée
Définition
Invar 36 Nickel Iron Alloy Tubes with High Dimensional Stability and Corrosion Resistance for Precision Instruments

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.

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%

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    

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
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

 

Typical Physical properties

Density (g/cm3) 8.1
Electrical resistivity at 20ºC(OMmm2/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

 

 

Invar 36 Nickel Iron Alloy Tubes with High Dimensional Stability and Corrosion Resistance for Precision Instruments 0

 

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