Kovar Alloy Seamless Pipe - (Ni29Co18) Expandable alloy 4J29 for
Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely
used in the electronics industry. Kovar is a nickel-iron-cobalt,
controlled-expansion alloy which contains 29% nickel. Its
coefficient of expansion, which decreases with rising temperature
to the inflection point, matches the expansion rate of borosilicate
glasses and alumina ceramics.
Kovar alloy has been used for making hermetic seals with the harder
Pyrex glasses and ceramic materials. This alloy has found wide
application in power tubes, microwave tubes, transistors, and
diodes. In integrated circuits, it has been used for the flat pack
and the dual-in-line package.
Kovar Alloy Seamless Pipe Chemical Composition
|Kovar||Max 0.03||Max 0.020||Max 0.020||Max 0.50||Max 0.30||Max 0.20||Max 0.20||Max 0.20||28.5-29.5||16.8-17.8||Bal.|
Kovar Alloy Specifications
Kovar Alloy Physical Properties
Kovar Alloy Mechanical Properties
|Grade||Tensile Strength N/mm²|
|Soft||1/4 Hard||1/2 Hard||3/4 Hard||Full Hard|
Coefficient of Expansion
|Alloy||Linear Coefficient of Thermal Expansion a,10-6/°C|
Kovar Alloy Seamless Pipe Applications:
Precision instruments, measuring tapes, weights, etc.
1. The Leading manufacturer of nickel based alloy Porducts
2. The drafter & Reviser Of National Standard GB/T1234
regarding Electrothermal Alloy.
3. Over 20 years experience
4. Small quantity, short time delivery
If we have stocks, we can ship from a minimum of 1 kg sample in a
few days.We also manufacture
custom-order materials in amounts of 100 kg and up (Some materials
are allowed 50 kg) in as
few as 3 weeks.
5. High-precision thickness
We guarantee thickness tolerances that cannot be reproduced by
t <0.30mm Tolerance ±1 - 3 μm guaranteed
0.30 mm≤t Tolerance ± 1% guaranteed
6. complete QC system & Advanced physical and chemical testing
For each production processing, we have complete QC system for the
chemical compostion and
Physical properties. After production, all the goods will be
tested, and the quality certificate will be
shipped along with goods.
7. Effective and strong technical support and custom-made solutions
We provide customed solutions to your problems with our strong
technologies and well versed
knowledge of materials acquired through our more than 20
8. Choose the appropriate base metals for your needs
We carefully balance quality, delivery time and price,procure
various base metals from all over
the world.We manufacture appropriate products to your needs.
9. Reliable certificate (ISO 9001/ROHS/BV/SGS/TUV)
Our products meet the standards, such as ASTM, ASME, AMS, DIN, JIS
etc. The third party testing
is available for us.
What is your working time?
Monday-Saturday : 7:30AM-17:00PM (Beijing time, GMT+08.00)
We have public holiday during May.1-3, Oct.1-7 and Chinese New Year
holiday . Pls email us during our holiday if u have any question
Do you provide free samples?
Yes, we can provide a free sample for testing,buyer should bear all
the shipping costs.
What is your payment terms?
The goods can also be packed as the clients' demand.
Our products series:
Inconel alloy: Inconel 600, 601, 617, X-750, 625,690, 718,825.
Incoloy alloy: Incoloy 800, 800H, 800HT, 825, 925.
Hastelloy alloy: HC-276, C-22, C-4, HB, B/2/3, X, N.
NiCr Alloy: Cr20Ni80, Cr30Ni70, Cr20Ni35, Cr20Ni30, Cr15Ni60.
CuNi Alloy: NC003, NC010, NC012, NC015, NC020, NC025, NC030, NC040,
NC050, Constantan, 6J8/11/12/13/.
Welding wire: ERNiCrMo-3/4/13, ERNiCrFe-3/7, ERNiCr-3/7, ERNiCu-7,
Thermocouple alloy: K, J, E, T, N, S, R, B, KX, JX, EX, TX, NX.
Our Service For You
1. Sample can be offered with sample charge and courier fee by
2. We have full stock,and can deliver within short time.Many styles
for your choices.
3. OEM and ODM order are accepted, Any kind of logo printing or
design are available.
4. Good Quality + Factory Price + Quick Response + Reliable
Service, is what we are trying best to offer you
5. All of our products are produce by our professional workman and
we have our high-work-effect foreign trade team, you can totally
believe our service.
If we have stocks for your demanded size, we can deliver within 3
For customised sizes and in quantity over100 kg (Some materials are
allowed MOQ 50 kg),we can guarantee delivery within 3 weeks or 25
Usually sample lead time is 7 days after payment has been