DESCRIPTION
Kovar Alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, coining, stamping and machining.
APPLICATIONS
Power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.
Kovar Alloy Chemistry
Elements maximum % unless noted
Iron Balance
Nominal Nickel 29
Nominal Cobalt 17
Carbon 0.02
Silicon 0.20
Chromium 0.20
Kovar Alloy Physical Properties
Density lb/cu in / 0.302
Specific Gravity 8.36
Curie Temp °F / °C 815/ 435
Melting Point °F / °C 2640/ 1449
Electrical Resistivity Micro-ohm-cm / Micro-ohm-cm 40/ 294
Thermal Conductivity W/cm °C / BTU-in/sq. ft-hr- 0.17/ 120
Specific Heat Cal/g- °C / BTU/lbm- °F 0.11/ 0.11
Thermal Exp ppm/°F (75°F to 842°F) / ppm/°C (25°C to 450°F) 2.9/ 5.3
Kovar Alloy Mechanical Properties
Tensile Strength Ksi/MPa 75/518
Yield Strength Ksi/MPa 40/276
Elongation % in 2 in/ 30
Typical Hardness Ann Rockwell/ HRB80
Modulus of Elasticity Mpsi/KMPa 30/207
Kovar Alloy Linear Coefficient of Thermal Expansion
Degree C value DegreeC value
30-100 --- 30-450 5.1 - 5.5
30-150 --- 30-475 ---
30-200 5.5 30-500 6.2
30-250 --- 30-525 ---
30-300 5.1 30-550 ---
30-325 --- 30-600 7.9
30-350 --- 30-700 9.3
30-375 --- 30-800 10.4
30-400 4.6 - 5.2 30-900 11.5
30-425 --- 30-1000 ---
Kovar Specifications
ASTM F-15/F-1466 MIL 1-23011CL1 AMS 1-23011CL1
XAGY Inc was establish in 1993, with a company mission to provide a high qulity, reliable source for precision alloy and high temperature alloys in both scientific research and production . This mission continues today, after more than twenty-three years.
XAGY Inc, continuing goal is to supply high quality products, service, and support to our customers at competitive prices. flexibility enables prompt response to any customer's unique needs. We can ship orders faster, you will always be greeted by a competent sales representative during business hours when you call...or email .
The company was certified by the ISO9001-2008 quality system in June 2005. In June 2000, it was certified as high-tech factory by Shaanxi Provincial Department of Science & Technology. In 2005, Shaanxi Provincial Development and Reform Commission identified the major businesses of the company as the industries that the country mainly encourages and develops.
Throughout our 23+ years of service we have come to be a valued resource for precision alloy for domestic and international manufacturing companies and worldwide, as well as most china government. To pursue excellent and surpass oneself is what XAGY Inc has been striving for. We always follow the principle of "quality and technology first, sincere service and observing the contract" and try our best to develop XAGY Inc into a metallice functional material manufacturer with core competitiveness and continuous capabilities of growth so as to provide all our customers with more and better services and products.
1. Sample free
2, Faster delivery
3, Helpful staff
4, Quick response
6, Testing before shipping
7, We will reply you for your inquiry in 24 hours.
8, Advanced facilities
9. Technical support
10. No min order request
11.Technical Information
If you have a technical question relating to a Controlled Expansion, Electrical/Electronic Nickel, Soft Magnetic or Refractory application, or need assistance with a specific material, you can visit our web or email supportsales﹫ Ask the Experts service here;
FAQ
1.Q: How can I trust this factory ?
A: Our stock number is 836660(China new stock market), also you can visit our website . Our factory's License and certificate appear on the website.(License Number can check the aptitude of the factory on Chinese Gov web ,English version available )
2. Q: Is this factory far away from the port? Is this will take longer for delivery?
A: From Xi'an to any port in China with in one day, convenient transportation only can improve the delivery.
3. Q: Where is your factory located? How can I visit there?
A: Our factory is located in Xi'an, Shaanxi Province, China.
All our clients from all over the world, are warmly welcome to visit us! Free pick up !
4. Q: How can I get some samples?
A: We are honored to offer you samples.(sample will delivery as our stock size)
5.Q: How does your factory do regarding quality control?
A. Quality is priority. our factory have advanced facilities, High qualified technical personnel and technical support and always attach great importance to quality controlling from beginning to end. All requirements with ASTM, UNS, GOST standards.
6.Q Are you ISO 9001 approved ?
A:Yes,we have held ISO 9001 approval since 2000.
7.Q；How can I pay ?
A: Payment can be made by T/T, L/C, D/A, D/T ,Western Union .
8.What is your minimum order quantity?
A: We can manufactures from as small as few kilogram to your specification.
9.Q：What is your standard of the lead time ?
A: Typical manufacturing lead times are around three working weeks.
If you have an urgent requirement, we have an emergency manufacturing service(EMS)available .
10.Q： Do you offer testing services?
A:Yes ,we can offer test date for you. Although we are not certified by international authority, our equipment is regularly calibrated and certified and our staff are fully competent. We can carry out for you ,using our in-house equipment.
11.Q：Do you deliver worldwide ?
A: Precision alloy supplies customers world wide.by Air, Sea, Ground, We can despatch using your carrier account if you prefer. All products are packed suitably for transportation.
12.Q：Can you make to my specification/drawing ?
A:We do manufacture to individual specifications / drawings. Please send us your specification / drawing for our production team to confirm if we can meet your requirements.
13.Q： Who do I send my enquiry to?
A: Please send your enquiries to Supportsales﹫
14.Q： Who do I contact when progressing my order?
A: Send an e-mail titled Order Progress to Supportsales﹫