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4j29 Kovar Precision Alloy Tube For Glass Plastic Seals

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4j29 Kovar Precision Alloy Tube For Glass Plastic Seals

Brand Name : JX

Model Number : 4j29 Kovar Precision Alloy Tube

Certification : ISO

Place of Origin : china

MOQ : 100kgs

Price : Negotiable

Payment Terms : L/C, T/T

Supply Ability : 3000T

Delivery Time : 35days

Packaging Details : Standard wooden case

Product Type : 4j29 Kovar Precision Alloy tube for Glass Plastic Seals

Material : Feni Alloy

Carbon Content : low

Transport Package : wooden case

Shape : round bar

Condition : soft

Surface : Bright

Origin : China

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4j29 Kovar Precision Alloy tube for Glass Plastic Seals

Product Description

Kovar Precision Alloy tube Description
Kovar Tube is a nominal 29%NiCoFe alloy that is a well-known glass-sealing alloy suitable for sealing to hard glasses.
(Common Name: Kovar, NiFeCo29, NiCoFe294,Nilo K)

Kovar Precision Alloy tube Chemical Domposition

alloy C Mn Si P S Ni Cr Co Cu Mo Fe
4J29 ≤0.03 ≤0.50 ≤0.30 ≤0.020 ≤0.020 28.5~29.5 ≤0.20 16.8~17.8 ≤0.2 ≤0.2

balance
Controlled Expansion and Glass Sealing Alloys
German standard number Tradename DIN UNS
1.2937 Alloy 29 17745 K92900
1.3917 Alloy 42 17745 K94100
1.3922 Alloy 48 17745 K94800
1.3981 Pernifer2918 17745 K94610
2.4478 NiFe 47 17745 N14052
2.4486 NiFe47Cr 17745 -

Typical Physical properties

Density (g/cm3) 8.2
Electrical resistivity at 20ºC(OMmm2/m) 0.48
Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC 3.7~3.9
Curie point Tc/ ºC 430
Elastic Modulus, E/ Gpa 138

Tensile Strength, MPa

Code of condition Condition Wire Strip
R Soft ≤585 ≤570
1/4I 1/4 Hard 585~725 520~630
1/2I 1/2 Hard 655~795 590~700
3/4I 3/4 Hard 725~860 600~770
I Hard ≥850 ≥700

Kovar Tube Picture:

4j29 Kovar Precision Alloy Tube For Glass Plastic Seals4j29 Kovar Precision Alloy Tube For Glass Plastic Seals

The heat treatment process

Annealing for stress relief Heated to 470~540ºC and hold 1~2 h. Cold down
annealing In vacuum heated to 750~900ºC
Holding time 14 min~1h.
Cooling rate No more than 10 ºC/min cooled to 200 ºC

Coefficient of expansion

θ/ºC α1/10-6ºC-1 θ/ºC α1/10-6ºC-1
20~60 7.8 20~500 6.2
20~100 6.4 20~550 7.1
20~200 5.9 20~600 7.8
20~300 5.3 20~700 9.2
20~400 5.1 20~800 10.2
20~450 5.3 20~900 11.4

Product Tags:

Kovar Precision Alloy Tube

      

4j29 Precision Alloy Tube

      

Plastic Seals Kovar Alloy Tube

      
Wholesale 4j29 Kovar Precision Alloy Tube For Glass Plastic Seals from china suppliers

4j29 Kovar Precision Alloy Tube For Glass Plastic Seals Images

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