Precision Alloy 4j29/Kovar 29/Feni29 Heating Rod

• Product Type: Rod
• Material: Feni
• Carbon Content: Low Carbon
• PCD: 100mm
• ET: 0
• Hole: 0
• Model NO.: 4J29
• Status: Polished
• Transport Package: Wooden Case
• Specification: dia26mm, Length 500mm
• Trademark: UALLOY
• Origin: Hangzhou
• HS Code: 7505120000
• Production Capacity: 5000tons/Year

Product Description

4J29 dia 24mm Length 50mm,heating rod

MOQ:100KGS
PRICE:29.5USD/KGS
PAYMENT TERM:T/T in advance
 

Ualloy-4J29 also known as Kovar alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Most metals cannot seal to glass because their coefficient of thermal expansion is not the same as glass, so as the joint cools after fabrication the stresses due to the differential expansion rates of the glass and metal cause the joint to crack.

Ualloy-4J29was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Most metals cannot seal to glass because their coefficient of thermal expansion is not the same as glass, so as the joint cools after fabrication the stresses due to the differential expansion rates of the glass and metal cause the joint to crack.

Mainly used in electric vacuum components and emission control, shock tube, igniting tube, glass magnetron, transistors, seal plug, relay, integrated circuits lead, chassis, brackets and other housing sealing.

 

Normal composition%

Ni	28.5~29.5	Fe	Bal.	Co	16.8~17.8	Si	≤0.3
Mo	≤0.2	Cu	≤0.2	Cr	≤0.2	Mn	≤0.5
C	≤0.03	P	≤0.02	S	≤0.02

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

 

Typical Physical properties

Density (g/cm3)	8.2
Electrical resistivity at 20ºC(mm^2/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

 FAQ:
Q1.Is there any discount of the  wire?
A. Yes. Bigger quantity will get a discount.
Q2.Information needed if I want a quotation?
A Name, Standard, Material Grade(Chemical Composition), Size Quantity, Weight.
Q3. Can we visit your company/factory before place the order?
A. Yes. Welcome anytime
Q4: How does your factory do regarding quality control?
A. Quality is priority. We always attach great importance to quality controlling from beginning to end.