ALLOY K WERKSTOFF NR 1.3981, UNS K94610 KOVAR MANUFACTURER & EXPORTER
KOVAR PIPES & TUBES, NILO K AMS 7728 SHEETS & PLATES, AMS 7726 ALLOY K WIRES, BARS AMS 7727 RODAR SUPPLIER
At Metal Ministry Inc. Alloy K/UNS K94610 is available in Alloy K Wire, Alloy K Round Bar, Alloy K Forged Bar, Alloy K Hex Bar, Alloy K Flat Bar, Alloy K Circles, Alloy K Ring, Alloy K Tube, Alloy K Seamless Pipe, Alloy K Welded / ERW Pipe, Alloy K Sheet, Alloy K Plate, Alloy K Coil, Alloy K Flanges, Alloy K Fasteners, Alloy K Socket Weld Fittings, Alloy K Ferrule Fittings, Alloy K Perforated Sheet, Alloy K Chequered Plate, Alloy K Shim Sheet, Alloy K Rolls, Alloy K Blank, Alloy K Profile, Alloy K Foils, Alloy K Buttweld Fittings Like Cap, Elbow, Tee, Reducer. For all stock availability contact.
| Alloy Name | Trade Name | UNS No. | American Specs | German Specs | French Specs |
| Alloy K | Kovar Nilo-K Rodar |
UNS K94610 | ASTM F15 ASTM F26 AMS 7726 Wire AMS 7727 Bar and Forgings AMS 7728 Sheet, Strip and Plate MIL-I-23011 Class 1 |
Werkstoff 1.3981 | AFNOR NF A54-301 |
Kovar (Alloy K) is a nickel-iron-cobalt controlled-expansion alloy containing 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 K) is used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Kovar (Alloy K) is used for high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.
Iron cobalt nickel alloy Kovar® is precisely formulated and controlled to produce a coefficient of thermal expansion that is very close to that of hard glass or ceramic, which means that it expands and contracts at a similar rate. This material is ideal for applications that require glass to metal seals, especially where a hermetic seal must be maintained across a wide temperature range.
In what forms is Alloy K available at Metal Ministry Inc.?
Technical Data Sheet
| Kovar Chemical Composition (Basic Density 8.36) | |||||||||||||
| Weight% | Ni | Fe | Co | C | Mn | Si | Al | Cr | Mg | Zr | Ti | Cu | Mo |
| Alloy K Kovar |
29.0 | 53.0 | 17.0 | 0.04 max | 0.50 max | 0.20 | 0.10 max | 0.20 max | 0.10 max | 0.10 max | 0.10 max | 0.20 max | 0.20 max |
Typical Mechanical Properties
| Material | Condition | Yield Strength (0.1% Offset) | Tensile Strength | Elongation % | ||
| psi | MPa | psi | MPa | |||
| Alloy K Kovar |
Annealed | 49,000 | 340 | 75,000 | 520 | 42 |
Specifications
- UNS K94610
- Werkstoff Nr 1.3981
- DIN 17745
- ASTM F 15
- AMS 7726 Wire
- AMS 7727 Bars and Forgings
- AMS 7728 Sheet, Strip and Plate
- MIL-I-23011 class 1
- AFNOR NF A54-301
- S.E.W 385
- DILVER P
Registered Names
- Kovar ®
- Nicoseal ®
- Nicosel ®
- Rodar ®
- Telcoseal ®
- Sealvar ®
- Alloy 29-17 ®
- Nilo K ®
- Dilver ®
- Pernifer 29-18 ®
| ASTM 15 Alloy / Kovar Strip - Kovar Coil Thickness | ||
| 0.004 | 0.0142 | 0.045 |
| 0.0045 | 0.0145 | 0.050 |
| 0.005 | 0.015 | 0.059 |
| 0.006 | 0.020 | 0.060 |
| 0.007 | 0.025 | 0.062 |
| 0.008 | 0.030 | 0.064 |
| 0.0098 | 0.035 | 0.070 |
| 0.010 | 0.040 | 0.082 |
| 0.12 | 0.043 | |
| All Coil Slit to Your Width - Other sizes available on request | ||
| ASTM F15 Alloy / Kovar Sheet Cold Rolled Kovar Bright Annealed MIL I 23011C, CL.1 |
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| Thickness | Widths | Lengths | ||
| 0.015 | x | 12, 13, 24" | x | 72 |
| 0.020 | x | 12, 13, 24" | x | 72 |
| 0.025 | x | 12, 13, 24" | x | 72 |
| 0.030 | x | 12, 13, 24" | x | 72 |
| 0.035 | x | 12, 13, 24" | x | 72 |
| 0.040 | x | 12, 13, 24" | x | 72 |
| 0.050 | x | 12, 13, 24" | x | 72 |
| 0.060 | x | 12, 13, 24" | x | 72 |
| 0.062 | x | 12, 24" | x | 72 |
| 0.072 | x | 12, 24" | x | 72 |
| 0.075 | x | 12, 24" | x | 72 |
| 0.080 | x | 12, 24" | x | 72 |
| 0.090 | x | Random Width | x | 72 |
| 0.092 | x | Random Width | x | 72 |
| 0.100 | x | Random Width | x | 72 |
| 0.115 | x | Random Width | x | 72 |
| 0.125 | x | Random Width | x | 72 |
| other sizes available upon request | ||||
| ASTM F15 Alloy / Kovar Coil | |
| 0.004 x 12 x coil | 0.0125 x 12 x coil |
| 0.0045 x 12 x coil | 0.0142 x 12 x coil |
| 0.005 x 12 x coil | 0.0145 x 12 x coil |
| 0.006 x 12 x coil | 0.015 x 12 x coil |
| 0.007 x 12 x coil | 0.020 x 12 x 72 |
| 0.008 x 12 x coil | 0.025 x 12 x 72 |
| 0.0095 x 12 x coil | 0.030 x 12 x 72 |
| 0.010 x 12 x coil | |
| other sizes available upon request | |
| ASTM F15 / Kovar Plate- Hot Rolled Kovar / MIL I 23011C Class 1 Ni/ Iron / Cobalt Alloy |
|
| 0.150 x 15 x 72 | 0.500 x 15 x 72 |
| 0.164 x 15 x 72 | 0.515 x 15 x 72 |
| 0.187 x 15 x 72 | 0.540 x 15 x 72 |
| 0.210 x 15 x 72 | 0.587 x 15 x 72 |
| 0.235 x 15 x 72 | 0.625 x 15 x 72 |
| 0.250 x 15 x 72 | 0.687 x 15 x 72 |
| 0.260 x 15 x 72 | 0.700 x 15 x 72 |
| 0.281 x 15 x 72 | 0.750 x 15 x 72 |
| 0.312 x 15 x 72 | 0.850 x 15 x 72 |
| 0.320 x 15 x 72 | 0.860 x 15 x 48 |
| 0.375 x 15 x 72 | 0.875 x 15 x 48 |
| 0.390 x 15 x 72 | 1.00 x 15 x 31 |
| 0.400 x 15 x 72 | 1.50 x 15 x 31 |
| 0.425 x 15 x 72 | 2.00 x 15 x 24 |
| 0.437 x 15 x 72 | |
| other sizes also available upon request | |
| ASTM F15 Alloy / Kovar Rod / Bar Certified to -196 °C with no phase transformation |
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| Diameter | |||
| 0.040 | 0.187 | 0.500 | 0.1375 |
| 0.050 | 0.200 | 0.562 | 1.500 |
| 0.060 | 0.203 | 0.625 | 1.625 |
| 0.062 | 0.218 | 0.750 | 1.750 |
| 0.100 | 0.250 | 0.875 | 2.0 |
| 0.125 | 0.312 | 1.0 | 2.125 |
| 0.156 | 0.375 | 1.125 | 2.5 |
| 0.178 | 0.437 | 1.250 | 3.0 |
| Available to 6" Dia Other sizes of Kovar Available upon request |
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Export Destination of Alloy K
Metal Ministry Inc. are Suppliers & Exports of Alloy K Round Bars, Pipes and Tubes & Wires to Countries like Afganistan - Kabul, Albania - Tirane, Algeria - Algiers, Andorra - Andorra la Vella, Angola - Luanda, Antigua and Barbuda - Saint John's, Argentina - Buenos Aires, Armenia - Yerevan, Australia - Canberra, Austria - Vienna, Azerbaijan - Baku, The Bahamas - Nassau, Bahrain - Manama, Bangladesh - Dhaka, Barbados - Bridgetown, Belarus - Minsk, Belgium - Brussels, Belize - Belmopan, Benin - Porto-Novo, Bhutan - Thimphu, Bolivia - La Paz, Sucre, Bosnia and Herzegovina - Sarajevo, Botswana - Gaborone, Brazil - Brasilia, Brunei - Bandar Seri Begawan, Bulgaria - Sofia, Burkina Faso - Ouagadougou, Burundi - Bujumbura, Cambodia - Phnom Penh, Cameroon - Yaounde, Canada - Ottawa, Cape Verde - Praia, Central African Republic - Bangui Chad - N'Djamena, Chile - Santiago, China - Beijing, Colombia - Bogota, Comoros - Moroni, Congo Republic of the - Brazzaville, Congo, Democratic Republic of the - Kinshasa, Costa Rica - San Jose, Cote d'Ivoire - Yamoussoukro, Abidjan (de facto), Croatia - Zagreb, Cuba - Havana, Cyprus - Nicosia, Czech Republic – Prague, Denmark - Copenhagen, Djibouti - Djibouti, Dominica - Roseau, Dominican Republic - Santo Domingo, East Timor (Timor-Leste) - Dili, Ecuador - Quito, Egypt - Cairo, El Salvador - San Salvador, Equatorial Guinea – Malabo, Eritrea - Asmara, Estonia - Tallinn, Ethiopia - Addis Ababa, Fiji - Suva, Finland - Helsinki, France - Paris, Gabon - Libreville, The Gambia - Banjul, Georgia - Tbilisi, Germany - Berlin, Ghana - Accra, Greece - Athens, Grenada - Saint George's, Guatemala - Guatemala City, Guinea - Conakry, Guinea-Bissau - Bissau, Guyana - Georgetown, Haiti - Port-au-Prince, Honduras - Tegucigalpa, Hungary - Budapest, Iceland - Reykjavik,India - Delhi, Indonesia - Jakarta, Iran - Tehran, Iraq - Baghdad, Ireland - Dublin, Israel - Jerusalem, Italy - Rome, Jamaica - Kingston, Japan - Tokyo, Jordan - Amman, Kazakhstan - Astana, Kenya - Nairobi, Kiribati - Tarawa Atoll, Korea, North - Pyongyang, Korea, South - Seoul, Kosovo - Pristina, Kuwait - Kuwait City, Kyrgyzstan - Bishkek, Laos - Vientiane, Latvia - Riga, Lebanon - Beirut, Lesotho - Maseru, Liberia - Monrovia, Libya - Tripoli, Liechtenstein - Vaduz, Lithuania - Vilnius, Luxembourg - Luxembourg, Macedonia - Skopje, Madagascar - Antananarivo, Malawi - Lilongwe, Malaysia - Kuala Lumpur, Maldives - Male, Mali - Bamako, Malta - Valletta, Marshall Islands - Majuro, Mauritania - Nouakchott, Mauritius - Port Louis, Mexico - Mexico City, Micronesia, Federated States of - Palikir, Moldova - Chisinau, Monaco - Monaco, Mongolia - Ulaanbaatar, Montenegro - Podgorica, Morocco - Rabat, Mozambique - Maputo, Myanmar (Burma) - Rangoon (Yangon); Naypyidaw or Nay Pyi Taw, Namibia - Windhoek, Nauru, Nepal - Kathmandu, Netherlands - Amsterdam; The Hague, New Zealand - Wellington, Nicaragua - Managua, Niger - Niamey, Nigeria - Abuja, Norway - Oslo, Oman - Muscat, Pakistan - Islamabad, Palau - Melekeok, Panama - Panama City, Papua New Guinea - Port Moresby, Paraguay - Asuncion, Peru - Lima, Philippines - Manila, Poland - Warsaw, Portugal - Lisbon, Qatar - Doha, Romania - Bucharest, Russia - Moscow, Rwanda - Kigali, Saint Kitts and Nevis - Basseterre, Saint Lucia – Castries, Saint Vincent and the Grenadines - Kingstown, Samoa - Apia, San Marino - San Marino, Sao Tome and Principe - Sao Tome, Saudi Arabia - Riyadh, Senegal - Dakar, Serbia - Belgrade, Seychelles - Victoria, Sierra Leone - Freetown, Singapore - Singapore, Slovakia - Bratislava, Slovenia - Ljubljana, Solomon Islands - Honiara, Somalia - Mogadishu, South Africa - Pretoria, Cape Town, Bloemfontein, South Sudan - Juba, Spain - Madrid, Sri Lanka - Colombo; Sri Jayewardenepura Kotte, Sudan - Khartoum, Suriname - Paramaribo, Swaziland - Mbabane, Sweden - Stockholm, Switzerland - Bern, Syria - Damascus, Taiwan - Taipei, Tajikistan - Dushanbe, Tanzania - Dar es Salaam; Dodoma, Thailand - Bangkok, Togo - Lome, Tonga - Nuku'alofa, Trinidad and Tobago - Port-of-Spain, Tunisia - Tunis, Turkey - Ankara, Turkmenistan - Ashgabat, Tuvalu - Vaiaku village, Funafuti province, Uganda - Kampala, Ukraine - Kyiv, United Arab Emirates - Abu Dhabi, United Kingdom - London, United States of America - Washington D.C., Uruguay - Montevideo, Uzbekistan - Tashkent, Vanuatu - Port-Vila, Vatican City Holy See) - Vatican City, Venezuela - Caracas, Vietnam - Hanoi, Yemen - Sanaa, Zambia - Lusaka, Zimbabwe – Harare.
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