Gold Member Since 2008
Audited Supplier
Shanghai Tankii Alloy Material Co., Ltd.

Kovar Seamless Tube, 4j29 Seamless Tube, Kovar Tube manufacturer / supplier in China, offering Seamless Tube of Kovar, Thermal Spray Wire Nial 95/5 with Competitive Price, Pure Nickel 0.25mm Ni200 wire in stock and so on.

(/ )

Seamless Tube of Kovar

FOB Price: US $300 / KG
Min. Order: 30 KG
Min. Order FOB Price
30 KG US $300/ KG
Get Latest Price
Production Capacity: 1 Tons Per Month
Transport Package: Waterproof Paper, Wooden Case
Payment Terms: L/C, T/T, Paypal, Western Union

Request a custom order and have something just for you!

Send Customized Request
Basic Info
  • Model NO.: Kovar tube/ 4J29 tube
  • Material: Feni
  • Shape: Tube
  • Surface: Bright
  • Diameter Inside: 0.5-10mm
  • Sample: Free
  • Specification: RoHs
  • HS Code: 750712000
  • Product Type: Tube
  • Carbon Content: Low Carbon
  • Condition: Soft
  • Diameter Outside: 2-30mm
  • MOQ: 5 Kgs
  • Trademark: TANKII-429
  • Origin: China
Product Description
Grade : Kovar nickel-cobalt ferrous alloy/ 29HK/ 4J29
 
Classification : the alloy of expansion characteristics

Application: Kovar (trademark of CRS Holdings, inc., Delaware[1]) is a nickel-cobalt ferrous alloy compositionally identical to Fernico 1, designed to be compatible with the thermal expansion characteristics of borosilicate glass (~5 × 10?6 /K between 30 and 200 °C, to ~10 × 10?6 /K at 800 °C) in order to allow direct mechanical connections over a range of temperatures. It finds application in electroplated conductors entering glass envelopes of electronic parts such as vacuum tubes (valves), X-ray and microwave tubes and some lightbulbs.
 
 
Chemical Composition in %  Kovar


 Ni
28,5-29,5%

Fe
51,14-54,5%

C
0.03%

Si
0.3%

Mn
0,4 %

S
o 0.015%

P
0.015%

o
17-18%

Ti
0.1%

Al
0.2%

Cu
0.2%

Cr
0,1 %
 
 
The thermal properties of alloy
 
Temperature coefficient of linear expansion αsr ? 10-6 K-1 in the temperature range, ° Cinflection point temperature, ° C
No less
Heat treatment regime blanks and samples
20-8020-10020-30020-40020-45020-50020-800
--4,6-5,64,6-5,2-5,9-6,4-420samples and blanks annealing in hydrogen, a vacuum or protective atmosphere at a temperature (960 ± 20) ° C, holding 1 hr., cooling with the furnace or container to 200 ° C at a rate not exceeding 10 ° C / min

PropertysinteredHIPed
Density / g cm38.08.35
Hardness / HV1160150
Youngs Modulus / GPa138138
reduction of area at fracture / %3030
yield strength / MPa270270
thermal conductivity / W/Km17
Curie Temperature / °C435
electrical resistivity Ω mm2 / m0.49
specific heat J/gK0.46
thermal expansion coefficient/10?6 K?1 (25 - 200 °C)5.5
(25-300 °C)5.1
(25-400 °C)4.9
(25-450 °C)5.3
(25-500 °C)6.2














 
The name Kovar is often used as a general term for Fe-Ni alloys with these particular thermal expansion properties. Note the related particular Fe-Ni alloy Invar which exhibits minimum thermal expansion.
 
TANKII, referring to the presence of high-power production, offers customers buy alloy Kovar in the required quantities and ensures minimum time shipments of rolled metal products, made on the basis of Kovar.
Send your message to this supplier
Avatar
Mr. Martin
Manager
*From:
To: Mr. Martin
*Message:

Enter between 20 to 4,000 characters.

This is not what you are looking for? Post a Sourcing Request Now

Find Similar Products By Category