High Quality Expansion Alloy DIN1.3912/Uns K94610 Kovar Strip

• Customization: Available
• Product Type: Wire
• Material: Fenico
• Model NO.: 4J29
• Carbon Content: Low Carbon
• PCD: 98mm
• ET: 0
• Hole: 0
• Status: Annealling Bright
• Type: Strip,Sheet
• Density: 8.2g/cm3
• Resistivity: 0.48ohmmm2/M
• Common Name: Kovar, Nilo K, Kv-1, Dilver Po, Vacon 12
• Curie Point: 430
• Elastic Modulus: 138
• Transport Package: Wooden Case
• Specification: >10mm
• Trademark: UALLOY
• Origin: Hangzhou
• HS Code: 7226999001
• Production Capacity: 5000tons/Year

Product Description

High quality Expansion Alloy DIN1.3912/UNS K94610 Kovar Strip

4J29 the other common Name: Kovar, Nilo K, KV-1, Dilver P_o, Vacon 12, ASTM F15, W.Nr 1.3912, UNS K94610 Ni29Co18)
 

FeNiCo Glass Sealing Alloys
Grade	4J29,4J44
Size	Strip:(0.03-0.1)mm*(180-250)mm (0.1-1.0)mm*(10-250)mm (1.0-3.0)mm*(100-250)mm Wire:0.1-6.0mm Bar:20-100mm(Hot forging)        2.0-20mm(Cold drawing)
Features	It has a certain linear expansion coefficient in the temperature range of -60ºC ~ + 400ºC, which can be matched with hard glass to seal firmly
Application	Suitable for 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%

Grade	C	P	S	Mn	Si	Cu	Cr	Mo	Ni	Co	Fe
4J29	≤0.03	≤0.02	≤0.02	≤0.5	≤0.3	≤0.2	≤0.2	≤0.2	28.5-29.5	16.8-17.8	Bal.
4J44	≤0.03	≤0.02	≤0.02	≤0.5	≤0.3	≤0.2	≤0.2	≤0.2	34.2-35.2	8.5-9.5	Bal.

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(Om*mm2/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

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

Thermal conductivity

θ/ºC	100	200	300	400	500
λ/ W/(m*ºC)	20.6	21.5	22.7	23.7	25.4

 

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

Style of supply

Packing and Shipping


Our test machines

Our other precision alloy


FAQ

1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want.
If the size is not in stoct, our MOQ will be about 30kgs.

2. How can you pay for small sample amount?
We have Western union account, wire transfer for sample amount also ok.

3. Customer do not have express account. How will us arrange the delivery for sample order?
Just need to provide your address information, we will check the express cost, you can arrange the express cost together with sample value.

4. What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery and total amount. Let's talk more in details after getting your detailed requirements.

5. Do you provide free samples?
If you want several meters and we have stock of your size, we can provide, customer need to bear the International express cost.

6. What's our working time?
We will give you reply through email/phone Online contact tool within 24 hours. No matter working day or holidays.