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

Dettagli del prodotto

Luogo di origine: Shangai, Cina

Marca: TANKII

Certificazione: ISO9001, SGS

Numero di modello: invar36

Termini di trasporto & di pagamento

Quantità di ordine minimo: 10 chilogrammi

Prezzo: Negoziabile

Imballaggi particolari: cassa di legno

Tempi di consegna: 7-20 giorni

Termini di pagamento: L/C, T/T, Western Union

Capacità di alimentazione: 100 Tonnellate al mese

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Specificità
Evidenziare:

Invar 36 nickel iron alloy tubes

,

Invar36 pipes for green buildings

,

precision alloy Invar 36 tubes

Modello n.:
Invar 36
OD:
0,20 mm minimo
PESO:
0.015 mm
Lunghezza:
0,20 mm minimo
Forma:
tubo a spirale; Tubo capillare Tubi senza saldatura
Superficie:
Superficie luminosa
Campione:
piccolo ordine accettato
Modello n.:
Invar 36
OD:
0,20 mm minimo
PESO:
0.015 mm
Lunghezza:
0,20 mm minimo
Forma:
tubo a spirale; Tubo capillare Tubi senza saldatura
Superficie:
Superficie luminosa
Campione:
piccolo ordine accettato
Descrizione
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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