{"id":3052,"date":"2026-09-15T15:11:45","date_gmt":"2026-09-15T12:11:45","guid":{"rendered":"https:\/\/www.defencemetal.com\/?page_id=3052"},"modified":"2026-09-25T16:27:59","modified_gmt":"2026-09-25T13:27:59","slug":"kovar","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/kovar\/","title":{"rendered":"Kovar \/ (1.3981) \/ ASTM F15"},"content":{"rendered":"

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Kovar \/ (1.3981) \/ UNS K94610 \/ ASTM F15<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Kovar<\/div>\n
UNS K94610 \u00b7 W.Nr. 1.3981 \u00b7 DIN 17745 \u00b7 FeNi29Co17 \u00b7 ~%53 Fe \u2013 %29 Ni \u2013 %17 Co. Yan elementler: C %0,02-0,04 maks. \u00b7 Mn %0,30-0,50 maks. \u00b7 Si %0,20 maks. \u00b7 Cr %0,20 maks. \u00b7 Cu %0,20 maks. \u00b7 Mo %0,20 maks. \u00b7 Al, Mg, Zr, Ti her biri %0,10 maks. \u00b7 P ve S %0,02 maks. Demir-nikel-kobalt kontroll\u00fc genle\u015fme ala\u015f\u0131m\u0131d\u0131r. ASTM F15, demir, nikel ve kobalt oranlar\u0131n\u0131n ala\u015f\u0131m genle\u015fme katsay\u0131s\u0131 \u015fart\u0131n\u0131 sa\u011flayacak bi\u00e7imde \u00fcretici taraf\u0131ndan AYARLANMASINI \u015fart ko\u015far; bu \u00fc\u00e7 element i\u00e7in verilen de\u011ferler nominaldir. Di\u011fer \u00fcretici adlar\u0131: NILO ala\u015f\u0131m K, Alloy K, Rodar, Pernifer 2918.<\/div>\n
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Kar\u0131\u015ft\u0131r\u0131lmamas\u0131 gerekenler<\/div>\n

Invar 36<\/a><\/div>\n<\/div>\n

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Ne i\u00e7in<\/div>\n
As\u0131l i\u015fi CAM-METAL SIZDIRMAZ GE\u00c7\u0130\u015eT\u0130R (hermetic seal). \u00c7\u00d6KELME SERTLE\u015eMEZ ve \u0131s\u0131l i\u015flemle sertle\u015ftirilemez; ay\u0131rt edici \u00f6zelli\u011fi mekanik dayan\u0131m de\u011fil ISIL GENLE\u015eME E\u011eR\u0130S\u0130N\u0130N B\u0130\u00c7\u0130M\u0130D\u0130R.<\/div>\n<\/div>\n
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Formlar<\/div>\n
Yuvarlak \u00e7ubuk \u00b7 lama \u00b7 levha \u00b7 sac \u00b7 \u015ferit \u00b7 boru \u00b7 tel \u00b7 d\u00f6vme. T\u00fcm formlar sipari\u015f bazl\u0131 temin edilmektedir.<\/div>\n<\/div>\n
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Standartlar<\/div>\n
AMS 7726<\/b> \u2014 tel; SAE ba\u015fl\u0131\u011f\u0131 ‘Iron-Nickel-Cobalt Alloy, Wire 53Fe – 29Ni – 17Co Low Expansion, Glass Sealing, Annealed’. \u00b7 AMS 7727<\/b> \u2014 \u00e7ubuk ve d\u00f6vme; SAE ba\u015fl\u0131\u011f\u0131 ‘Iron-Nickel-Cobalt Alloy, Bars and Forgings 53Fe – 29Ni – 17Co Low Expansion, Glass Sealing’. \u00b7 AMS 7728<\/b> \u2014 sac, \u015ferit ve levha; SAE ba\u015fl\u0131\u011f\u0131 ‘Iron-Nickel-Cobalt Alloy, Sheet, Strip, and Plate, 53Fe – 29Ni – 17Co, Low Expansion Glass Sealing, Annealed’. \u00b7 AMS-I-23011 \/ MIL-I-23011 S\u0131n\u0131f 1 (‘Iron-Nickel Alloys for Sealing to Glasses and Ceramic’). \u00b7 ASTM F15 \u2014 demir-nikel-kobalt s\u0131zd\u0131rmazl\u0131k ala\u015f\u0131m\u0131; tel, \u00e7ubuk, lama, \u015ferit, sac ve boruyu kapsard\u0131 ve 2024’te YER\u0130NE KOYULMADAN GER\u0130 \u00c7EK\u0130LD\u0130. Son ge\u00e7erli bask\u0131 F15-04(2022). \u00b7 DIN 17745.
\u015eARTNAME BO\u015eLU\u011eU: ASTM F15’in 2024’te geri \u00e7ekilmesiyle y\u00fcr\u00fcrl\u00fckte kalan tek \u015fartname ailesi AMS 7726\/7727\/7728’dir. Bu \u00fc\u00e7 numara TEL, \u00c7UBUK-D\u00d6VME ve SAC-\u015eER\u0130T-LEVHA formlar\u0131n\u0131 kapsar; BORU (tube) bu \u00fc\u00e7\u00fcn\u00fcn hi\u00e7birinde yoktur.<\/span><\/div>\n<\/div>\n
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Art\u0131s\u0131<\/div>\n
Genle\u015fme E\u011eR\u0130S\u0130 20-450 \u00b0C aras\u0131nda d\u00fczd\u00fcr ve borosilikat cam\u0131n e\u011frisiyle bu bant boyunca \u00f6rt\u00fc\u015f\u00fcr. Special Metals NILO ala\u015f\u0131m K i\u00e7in 20 \u00b0C referansl\u0131 ortalama katsay\u0131lar\u0131 20-100 \u00b0C: 6,0 \u00b7 20-200 \u00b0C: 5,5 \u00b7 20-250 \u00b0C: 5,3 \u00b7 20-300 \u00b0C: 5,1 \u00b7 20-400 \u00b0C: 4,9 \u00b7 20-500 \u00b0C: 6,2 \u00d710\u207b\u2076\/\u00b0C olarak verir.<\/div>\n<\/div>\n
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Kaynak<\/div>\n
Kovar, cam-metal ge\u00e7i\u015f par\u00e7alar\u0131nda ergitme kayna\u011f\u0131yla de\u011fil, lehimleme ve diren\u00e7 kayna\u011f\u0131yla birle\u015ftirilir; ergitme kayna\u011f\u0131 yap\u0131lacaksa TIG kullan\u0131l\u0131r ve \u0131s\u0131 girdisi s\u0131n\u0131rlan\u0131r.<\/div>\n<\/div>\n
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S\u0131n\u0131rlar\u0131<\/div>\n
450 \u00b0C \u00dcZER\u0130NDE GENLE\u015eME E\u011eR\u0130S\u0130 BOZULUR. D\u00f6n\u00fcm noktas\u0131 450 \u00b0C’dir; bu noktan\u0131n \u00fczerinde genle\u015fme katsay\u0131s\u0131 keskin bi\u00e7imde y\u00fckselir (20-500 \u00b0C ortalamas\u0131 6,2; 600-700 \u00b0C aral\u0131\u011f\u0131nda 7,8; 800-900 \u00b0C aral\u0131\u011f\u0131nda 10,3 \u00d710\u207b\u2076\/\u00b0C). Camla \u00f6rt\u00fc\u015fme biter ve ge\u00e7i\u015f gerilim alt\u0131nda kal\u0131r. Curie s\u0131cakl\u0131\u011f\u0131 435 \u00b0C’dir;<\/div>\n<\/div>\n
TEKL\u0130F \u0130STE<\/a>T\u00fcm nikel ala\u015f\u0131mlar\u0131 →<\/a>TEKN\u0130K DETAYLAR ↓<\/span><\/div>\n
Veriler \u00fcretici veri sayfalar\u0131ndan derlenmi\u015ftir · sipari\u015f \u00f6ncesi g\u00fcncel \u015fartnameden teyit ediniz<\/div>\n<\/div>\n<\/div>\n

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