{"id":3254,"date":"2026-09-15T22:20:45","date_gmt":"2026-09-15T19:20:45","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/15\/aisi-4340-300m-farki\/"},"modified":"2026-09-15T23:54:04","modified_gmt":"2026-09-15T20:54:04","slug":"aisi-4340-300m-farki","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/15\/aisi-4340-300m-farki\/","title":{"rendered":"AISI 4340 ile 300M Aras\u0131ndaki Fark Nedir?"},"content":{"rendered":"

Havac\u0131l\u0131k \u015fartnamelerinde AISI 4340<\/strong> ve 300M<\/strong> \u00e7o\u011fu zaman yan yana ge\u00e7er. Bunun bir sebebi var: 300M, s\u0131f\u0131rdan tasarlanm\u0131\u015f ayr\u0131 bir ala\u015f\u0131m de\u011fil, 4340’\u0131n g\u00fc\u00e7lendirilmi\u015f bir t\u00fcrevidir<\/strong>. Nikel, krom ve molibden iskeleti neredeyse ayn\u0131d\u0131r; fark iki elementte toplan\u0131r.<\/p>\n

Silisyum ve vanadyum<\/h3>\n

AISI 4340’ta silisyum %0,15\u20130,30<\/strong> aral\u0131\u011f\u0131ndad\u0131r. 300M’de bu oran %1,45\u20131,80<\/strong>‘e \u00e7\u0131kar, yani yakla\u015f\u0131k alt\u0131 kat\u0131na. Buna %0,05\u20130,10 vanadyum<\/strong> eklenir ve molibden %0,20\u20130,30’dan %0,30\u20130,50’ye y\u00fckseltilir.<\/p>\n

Y\u00fckseltilmi\u015f silisyum, \u00e7eli\u011fin temperleme s\u0131ras\u0131nda yumu\u015famaya direnmesini sa\u011flar. Bu sayede par\u00e7a daha y\u00fcksek s\u0131cakl\u0131kta temperlenebilir; gerilim giderilirken mukavemet korunur. Vanadyum ise tane yap\u0131s\u0131n\u0131 inceltir. Sonu\u00e7, veri sayfalar\u0131m\u0131zdaki rakamlarda do\u011frudan g\u00f6r\u00fcn\u00fcr: 4340 sertle\u015ftirilip temperlendi\u011finde 1793 MPa<\/strong> \u00e7ekme dayan\u0131m\u0131 verirken, 300M ayn\u0131 i\u015flemle 1861\u20131931 MPa<\/strong> seviyesine \u00e7\u0131kar.<\/p>\n

Rakamlarla kar\u015f\u0131la\u015ft\u0131rma<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00d6ZELL\u0130K<\/th>\nAISI 4340<\/th>\n300M<\/th>\n<\/tr>\n<\/thead>\n
Karbon (C)<\/td>\n%0,38 \u2013 0,43<\/td>\n%0,38 \u2013 0,45<\/td>\n<\/tr>\n
Silisyum (Si)<\/td>\n%0,15 \u2013 0,30<\/td>\n%1,45 \u2013 1,80<\/td>\n<\/tr>\n
Nikel (Ni)<\/td>\n%1,65 \u2013 2,00<\/td>\n%1,65 \u2013 2,00<\/td>\n<\/tr>\n
Krom (Cr)<\/td>\n%0,70 \u2013 0,90<\/td>\n%0,70 \u2013 0,95<\/td>\n<\/tr>\n
Molibden (Mo)<\/td>\n%0,20 \u2013 0,30<\/td>\n%0,30 \u2013 0,50<\/td>\n<\/tr>\n
Vanadyum (V)<\/td>\n\u2014<\/td>\n%0,05 \u2013 0,10<\/td>\n<\/tr>\n
\u00c7ekme dayan\u0131m\u0131 Rm<\/td>\n1793 MPa (260 ksi)<\/td>\n1861 \u2013 1931 MPa (270 \u2013 280 ksi)<\/td>\n<\/tr>\n
Akma Rp0,2<\/td>\n1496 MPa (217 ksi)<\/td>\n1517 \u2013 1586 MPa (220 \u2013 230 ksi)<\/td>\n<\/tr>\n
Uzama<\/td>\n%10<\/td>\n%7 \u2013 8<\/td>\n<\/tr>\n
UNS<\/td>\nG43406<\/td>\n\u2014<\/td>\n<\/tr>\n
AMS<\/td>\n6414 \u00b7 6415 \u00b7 6484<\/td>\n6257 \u00b7 6417 \u00b7 6419<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

De\u011ferler \u00fcr\u00fcn veri sayfalar\u0131m\u0131zdan al\u0131nm\u0131\u015ft\u0131r; kesit kal\u0131nl\u0131\u011f\u0131 ve uygulanan \u0131s\u0131l i\u015flem rejimi sonucu de\u011fi\u015ftirir.<\/p>\n

Hangi durumda hangisi?<\/h3>\n

AISI 4340 tercih edilir<\/strong> \u2014 1700\u20131800 MPa s\u0131n\u0131f\u0131 mukavemetin yetti\u011fi miller, di\u015fli g\u00f6vdeleri, kritik ba\u011flant\u0131 elemanlar\u0131 ve genel havac\u0131l\u0131k par\u00e7alar\u0131. Temini daha kolayd\u0131r, i\u015flenmesi ve \u0131s\u0131l i\u015flemi daha yayg\u0131n bilinir.<\/p>\n

300M gerekir<\/strong> \u2014 ini\u015f tak\u0131m\u0131 elemanlar\u0131, u\u00e7ak \u00e7ekme kancalar\u0131, y\u00fcksek gerilmeli d\u00f6vme par\u00e7alar. Uzama de\u011ferinin 4340’a g\u00f6re bir miktar d\u00fc\u015fmesi pahas\u0131na mukavemet kazan\u0131l\u0131r; bu takas kabul edilebilir oldu\u011funda 300M kullan\u0131l\u0131r. \u015eartname AMS 6417<\/strong> veya AMS 6419<\/strong> \u00e7a\u011f\u0131r\u0131yorsa 4340 ile ikame edilmez.<\/p>\n

Bir \u00fcst basamak<\/h3>\n

300M’in de yetmedi\u011fi, ayn\u0131 mukavemetin \u00e7ok daha y\u00fcksek tokluk ile istendi\u011fi durumlarda AerMet 100<\/a> g\u00fcndeme gelir; ikisini kar\u015f\u0131la\u015ft\u0131rd\u0131\u011f\u0131m\u0131z yaz\u0131 burada<\/a>. 4340’\u0131n bir alt basama\u011f\u0131 i\u00e7in AISI 4140 \u2013 AISI 4340 kar\u015f\u0131la\u015ft\u0131rmas\u0131na<\/a> bakabilirsiniz.<\/p>\n

\n

Teknik veri sayfalar\u0131<\/p>\n

AISI 4340 \u2014 kimyasal bile\u015fim, mekanik de\u011ferler, standart kar\u015f\u0131l\u0131klar\u0131<\/a><\/p>\n

300M \u2014 kimyasal bile\u015fim, mekanik de\u011ferler, standart kar\u015f\u0131l\u0131klar\u0131<\/a><\/p>\n

Her iki kalite de yuvarlak \u00e7ubuk, lama, levha, sac, boru ve d\u00f6vme formlar\u0131nda sipari\u015f bazl\u0131 temin edilmektedir. Teklif i\u00e7in bize ula\u015f\u0131n<\/a>.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

300M asl\u0131nda silisyumu ve vanadyumu y\u00fckseltilmi\u015f bir AISI 4340 t\u00fcrevidir. Aradaki mukavemet fark\u0131 ve ini\u015f tak\u0131m\u0131 uygulamalar\u0131.<\/p>\n","protected":false},"author":1,"featured_media":3273,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3254","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-karsilastirmalar"],"yoast_head":"\nAISI 4340 ile 300M Fark\u0131 Nedir? | Defence Metal<\/title>\n<meta name=\"description\" content=\"300M, y\u00fckseltilmi\u015f silisyum ve vanadyum ile g\u00fc\u00e7lendirilmi\u015f bir 4340 t\u00fcrevidir. 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