{"id":3355,"date":"2026-09-15T23:25:43","date_gmt":"2026-09-15T20:25:43","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/15\/aisi-316l-aisi-904l-farki\/"},"modified":"2026-09-24T19:45:54","modified_gmt":"2026-09-24T16:45:54","slug":"aisi-316l-aisi-904l-farki","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/15\/aisi-316l-aisi-904l-farki\/","title":{"rendered":"AISI 316L ile AISI 904L Aras\u0131ndaki Fark Nedir?"},"content":{"rendered":"

AISI 316L<\/strong> paslanmaz \u00e7eli\u011fin klor\u00fcre dayan\u0131kl\u0131 standart kalitesidir. AISI 904L<\/strong> ise bamba\u015fka bir s\u0131n\u0131fa girer: ala\u015f\u0131m oran\u0131 o kadar y\u00fcksektir ki UNS numaras\u0131 bile paslanmaz \u00e7elik grubunda (S\u2026) de\u011fil, nikel ala\u015f\u0131m\u0131 grubunda (N08904)<\/strong> yer al\u0131r.<\/p>\n

Nikel, molibden ve bak\u0131r<\/h3>\n

Veri sayfalar\u0131m\u0131zdaki fark \u00e7arp\u0131c\u0131: 316L’de nikel %10,0\u201314,0<\/strong> iken 904L’de %23,00\u201328,00<\/strong>‘e \u00e7\u0131kar \u2014 iki kat\u0131ndan fazla. Molibden %2,0\u20133,0’ten %4,00\u20135,00<\/strong>‘e, krom %16,0\u201318,0’den %19,00\u201323,00<\/strong>‘e y\u00fckselir. \u00dcst\u00fcne 316L’de hi\u00e7 bulunmayan %1\u20132 bak\u0131r<\/strong> eklenir.<\/p>\n

Y\u00fcksek nikel, malzemeyi gerilmeli korozyon \u00e7atlamas\u0131na<\/strong> kar\u015f\u0131 diren\u00e7li k\u0131lar \u2014 316L’nin klor\u00fcrl\u00fc s\u0131cak ortamlarda en zay\u0131f oldu\u011fu nokta budur. Molibden \u00e7ukurcuk ve aral\u0131k korozyonuna diren\u00e7 sa\u011flar. Bak\u0131r ise \u00f6zel bir i\u015f yapar: indirgeyici asitlere<\/strong>, \u00f6zellikle s\u00fclf\u00fcrik ve fosforik asite kar\u015f\u0131 diren\u00e7 kazand\u0131r\u0131r. 904L’nin kimya ve g\u00fcbre end\u00fcstrisinde tercih edilmesinin sebebi tam olarak bu bak\u0131r katk\u0131s\u0131d\u0131r.<\/p>\n

Karbon da \u00e7ok d\u00fc\u015f\u00fck tutulur (max %0,02<\/strong>), yani 904L zaten do\u011fas\u0131 gere\u011fi “L” kalitesidir ve kaynak sonras\u0131 taneler aras\u0131 korozyona kar\u015f\u0131 korunakl\u0131d\u0131r.<\/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\n\n\n\n
\u00d6ZELL\u0130K<\/th>\nAISI 316L<\/th>\nAISI 904L<\/th>\n<\/tr>\n<\/thead>\n
Karbon (C)<\/td>\nmax %0,03<\/td>\nmax %0,02<\/td>\n<\/tr>\n
Krom (Cr)<\/td>\n%16,0 \u2013 18,0<\/td>\n%19,00 \u2013 23,00<\/td>\n<\/tr>\n
Nikel (Ni)<\/td>\n%10,0 \u2013 14,0<\/td>\n%23,00 \u2013 28,00<\/td>\n<\/tr>\n
Molibden (Mo)<\/td>\n%2,0 \u2013 3,0<\/td>\n%4,00 \u2013 5,00<\/td>\n<\/tr>\n
Bak\u0131r (Cu)<\/td>\n\u2014<\/td>\n%1 \u2013 2<\/td>\n<\/tr>\n
\u00c7ekme dayan\u0131m\u0131 Rm<\/td>\n485 MPa<\/td>\n490 MPa<\/td>\n<\/tr>\n
Akma Rp0,2<\/td>\n170 MPa<\/td>\n220 MPa<\/td>\n<\/tr>\n
Uzama A50<\/td>\n%40<\/td>\n%36<\/td>\n<\/tr>\n
Sertlik<\/td>\nmax 217 HB<\/td>\nmax 150 HB<\/td>\n<\/tr>\n
Yo\u011funluk<\/td>\n8,00 g\/cm\u00b3<\/td>\n7,90 g\/cm\u00b3<\/td>\n<\/tr>\n
Is\u0131l iletkenlik<\/td>\n16,3 W\/m\u00b7K<\/td>\n11,5 W\/m\u00b7K<\/td>\n<\/tr>\n
UNS<\/td>\nS31603<\/td>\nN08904<\/td>\n<\/tr>\n
W.Nr (DIN\/EN)<\/td>\n1.4404<\/td>\n1.4539<\/td>\n<\/tr>\n
AMS<\/td>\n5653 \u00b7 5507<\/td>\n\u2014<\/td>\n<\/tr>\n
ASTM<\/td>\nA276 \u00b7 A479 \u00b7 A484 \u00b7 A240<\/td>\nA182 \u00b7 A262 \u00b7 A479<\/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 316L yeterlidir<\/strong> \u2014 deniz suyu d\u0131\u015f\u0131ndaki klor\u00fcrl\u00fc ortamlar, g\u0131da ve ila\u00e7 tesisat\u0131, kaynakl\u0131 tanklar ve borular, genel proses ekipman\u0131. Maliyeti \u00e7ok daha d\u00fc\u015f\u00fckt\u00fcr ve temini her formda kolayd\u0131r.<\/p>\n

AISI 904L gerekir<\/strong> \u2014 s\u00fclf\u00fcrik asit ve fosforik asit hatlar\u0131, g\u00fcbre \u00fcretimi, baca gaz\u0131 des\u00fclf\u00fcrizasyon sistemleri, deniz suyu \u0131s\u0131 de\u011fi\u015ftiricileri, petrol\u2013gaz proses ekipman\u0131. 316L’nin \u00e7ukurcuk yapmaya veya gerilmeli \u00e7atlama vermeye ba\u015flad\u0131\u011f\u0131 yerde devreye girer.<\/p>\n

Dikkat edilmesi gereken bir nokta: 904L’nin mukavemeti 316L’den \u00e7ok y\u00fcksek de\u011fildir. 904L’yi se\u00e7menin sebebi mukavemet de\u011fil, korozyon direncidir. Y\u00fcksek mukavemet ve<\/em> y\u00fcksek korozyon direnci birlikte isteniyorsa dubleks \u00e7eliklere bakmak gerekir.<\/p>\n

Alternatifler<\/h3>\n

Ayn\u0131 korozyon s\u0131n\u0131f\u0131nda \u00e7ok daha y\u00fcksek mukavemet i\u00e7in AISI 318 (dubleks 2205)<\/a> ve AISI F53 (s\u00fcper dubleks)<\/a> bulunur. Daha da agresif ortamlar i\u00e7in Hastelloy C-276<\/a> ve Incoloy 825<\/a> gibi nikel ala\u015f\u0131mlar\u0131na ge\u00e7ilir.<\/p>\n

\n

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

AISI 316L \u2014 kimyasal bile\u015fim, mekanik de\u011ferler, standart kar\u015f\u0131l\u0131klar\u0131<\/a><\/p>\n

AISI 904L \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":"

904L, 316Lye g\u00f6re \u00e7ok daha y\u00fcksek nikel ve molibden i\u00e7erir; s\u00fclf\u00fcrik ve fosforik asit ortamlar\u0131 i\u00e7in geli\u015ftirilmi\u015ftir.<\/p>\n","protected":false},"author":1,"featured_media":3386,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3355","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-karsilastirmalar"],"yoast_head":"\nAISI 316L ile 904L Fark\u0131 Nedir? | Defence Metal<\/title>\n<meta name=\"description\" content=\"AISI 904L y\u00fcksek nikel, molibden ve bak\u0131r i\u00e7erir; 316Lnin yetmedi\u011fi asit ortamlar\u0131nda kullan\u0131l\u0131r. 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