{"id":6217,"date":"2026-09-25T19:52:53","date_gmt":"2026-09-25T16:52:53","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/25\/aisi-f55-aisi-f53-farki\/"},"modified":"2026-09-30T10:44:41","modified_gmt":"2026-09-30T07:44:41","slug":"aisi-f55-aisi-f53-farki","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/25\/aisi-f55-aisi-f53-farki\/","title":{"rendered":"AISI F55 ile AISI F53 Aras\u0131ndaki Fark Nedir?"},"content":{"rendered":"

AISI F55<\/strong> ve AISI F53<\/strong> s\u00fcper dubleks ailesinin iki en yayg\u0131n \u00fcyesidir. Krom ve nikel bantlar\u0131 ayn\u0131d\u0131r. Fark, F55’in bak\u0131r ve tungsten<\/strong> katk\u0131s\u0131nda ve — \u00e7ok daha \u00f6nemlisi — ASTM’in bu iki kaliteye farkl\u0131 uzama minimumu vermesindedir.<\/strong><\/p>\n

Bile\u015fimdeki fark<\/h3>\n

F53 (UNS S32750) saf bir krom-nikel-molibden-azot dublekstir: ne bak\u0131r ne tungsten ala\u015f\u0131m elementi olarak bulunur.<\/strong> Bak\u0131r i\u00e7in verilen max %0,50 bir safs\u0131zl\u0131k tavan\u0131d\u0131r, katk\u0131 de\u011fildir.<\/p>\n

F55 (UNS S32760) ise hem %0,50 – 1,00 bak\u0131r hem %0,50 – 1,00 tungsten i\u00e7erir. F53 bu iki elementten vazge\u00e7ip azotu yukar\u0131 \u00e7eker.<\/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
\u00d6ZELL\u0130K<\/th>\nAISI F55 (S32760)<\/th>\nAISI F53 (S32750)<\/th>\n<\/tr>\n<\/thead>\n
EN \/ W.Nr<\/td>\n1.4501<\/td>\n1.4410<\/td>\n<\/tr>\n
Karbon (C)<\/td>\nmax %0,030<\/td>\nmax %0,030<\/td>\n<\/tr>\n
Krom (Cr)<\/td>\n%24,00 – 26,00<\/td>\n%24,00 – 26,00<\/td>\n<\/tr>\n
Nikel (Ni)<\/td>\n%6,00 – 8,00<\/td>\n%6,00 – 8,00<\/td>\n<\/tr>\n
Molibden (Mo)<\/td>\n%3,00 – 4,00<\/td>\n— (bkz. not)<\/td>\n<\/tr>\n
Bak\u0131r (Cu)<\/strong><\/td>\n%0,50 – 1,00 (katk\u0131)<\/strong><\/td>\nmax %0,50 (safs\u0131zl\u0131k)<\/strong><\/td>\n<\/tr>\n
Tungsten (W)<\/strong><\/td>\n%0,50 – 1,00<\/strong><\/td>\nbelirtilmez<\/strong><\/td>\n<\/tr>\n
Azot (N)<\/td>\n%0,20 – 0,30<\/td>\n— (bkz. not)<\/td>\n<\/tr>\n
Mangan (Mn)<\/td>\nmax %1,00<\/td>\nmax %1,20<\/td>\n<\/tr>\n
Silisyum (Si)<\/td>\n—<\/td>\nmax %0,80<\/td>\n<\/tr>\n
Akma (Rp0,2)<\/td>\n\u2265 550 MPa<\/td>\n\u2265 550 MPa<\/td>\n<\/tr>\n
\u00c7ekme (Rm)<\/strong><\/td>\n\u2265 750 MPa<\/strong><\/td>\n\u2265 795 – 800 MPa<\/strong><\/td>\n<\/tr>\n
Uzama (ASTM A240)<\/strong><\/td>\n\u2265 %25<\/strong><\/td>\n\u2265 %15<\/strong><\/td>\n<\/tr>\n
Uzama (EN \/ NORSOK)<\/td>\n\u2265 %25<\/td>\n\u2265 %25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Molibden ve azot notu:<\/em> S32750 i\u00e7in ASTM ile EN aral\u0131klar\u0131 \u00f6rt\u00fc\u015fm\u00fcyor. ASTM taraf\u0131 Mo %3,0 – 5,0 ve N %0,24 – 0,32 verirken, EN 10088-3 (1.4410) taraf\u0131 Mo %3,0 – 4,5 ve N %0,24 – 0,35 veriyor. Arad\u0131\u011f\u0131m\u0131z d\u00f6rt ba\u011f\u0131ms\u0131z kurulu\u015fa ula\u015f\u0131lamad\u0131\u011f\u0131 i\u00e7in bu iki sat\u0131r\u0131 tabloda bo\u015f b\u0131rakt\u0131k. ASTM’e g\u00f6re \u00fcretilmi\u015f bir d\u00f6k\u00fcm\u00fcn EN’e \u00e7ift sertifikasyonu otomatik de\u011fildir.<\/strong><\/p>\n

En kritik sat\u0131r: uzama<\/h3>\n
\n

ASTM A240 kapsam\u0131nda F53’\u00fcn uzama minimumu %15, F55’inki %25’tir.<\/p>\n

Buna kar\u015f\u0131l\u0131k F53’\u00fcn \u00e7ekme dayan\u0131m\u0131 minimumu daha y\u00fcksektir (795–800 MPa’ya kar\u015f\u0131 750 MPa). Yani bu iki kalite birbirinin do\u011frudan e\u015fde\u011feri de\u011fildir<\/strong> ve \u00e7o\u011fu distrib\u00fct\u00f6r sitesinde bu fark yanl\u0131\u015f verilir. Resimde “min %25 uzama” \u015fart\u0131 varsa ASTM A240’a g\u00f6re F53 bunu kar\u015f\u0131lamaz.<\/p>\n<\/div>\n

“F55 daha \u00fcst\u00fcnd\u00fcr” iddias\u0131<\/h3>\n

Piyasada F55’in tungsteni sayesinde F53’ten \u00fcst\u00fcn oldu\u011fu s\u0131k\u00e7a s\u00f6ylenir. Veriler bunu desteklemiyor.<\/p>\n

Birincisi: tungsten \u00e7o\u011fu \u015fartnamenin PREN hesab\u0131na girmez.<\/strong> NORSOK M-630 dahil on kurulu\u015f tungstensiz form\u00fcl\u00fc (PREN = %Cr + 3,3×%Mo + 16×%N) kullan\u0131yor; tungstenli form\u00fcl\u00fc kullanan yaln\u0131zca Rolled Alloys ve IMOA.<\/p>\n

\u0130kincisi, ve daha \u00e7arp\u0131c\u0131s\u0131: Rolled Alloys’un kendi kar\u015f\u0131la\u015ft\u0131rmas\u0131<\/strong> — ki Rolled Alloys F55’in marka sahibidir — tungsten dahil edilmi\u015f form\u00fclle bile F53’\u00fc \u00f6nde g\u00f6steriyor (2507 i\u00e7in 41,9; ZERON 100 i\u00e7in 41,5).<\/p>\n

Dolay\u0131s\u0131yla aradaki fark PREN \u00fczerinden savunulamaz. Fark, F55’in bak\u0131r\u0131n\u0131n asit ortamlar\u0131ndaki katk\u0131s\u0131nda ve kaynak metali performans\u0131nda aranmal\u0131d\u0131r.<\/p>\n

Ortak \u00f6zellikler<\/h3>\n

Her iki kalite de NACE MR0175 \/ ISO 15156<\/strong> kapsam\u0131nda \u00e7\u00f6zeltiye al\u0131nm\u0131\u015f durumda maksimum 28 HRC<\/strong> sertlik s\u0131n\u0131r\u0131yla ek\u015fi servise uygundur, ve her ikisi de NORSOK M-630 malzeme veri sayfalar\u0131nda yer al\u0131r.<\/p>\n

\u00dcst servis s\u0131cakl\u0131\u011f\u0131 da ayn\u0131d\u0131r: yakla\u015f\u0131k 270 – 316 °C<\/strong>. S\u0131n\u0131r\u0131n sebebi mekanik de\u011fil metalurjiktir — ferrit faz\u0131ndaki alfa-prime \u00e7\u00f6kelmesi ve daha yukar\u0131da sigma faz\u0131.<\/p>\n

Sipari\u015f verirken dikkat<\/h3>\n
\n

\u00dc\u00e7 nokta<\/p>\n

1.<\/strong> Uzama \u015fart\u0131n\u0131 ASTM mi EN\/NORSOK mu esas alaca\u011f\u0131n\u0131z\u0131 yaz\u0131n — F53 i\u00e7in fark %15 ile %25 aras\u0131ndad\u0131r.<\/p>\n

2.<\/strong> Farkl\u0131 test standartlar\u0131nda \u00f6l\u00e7\u00fclm\u00fc\u015f CPT (kritik \u00e7ukurcuk s\u0131cakl\u0131\u011f\u0131) de\u011ferleri kar\u015f\u0131la\u015ft\u0131r\u0131lamaz. Ayn\u0131 \u00fcretici bile ayn\u0131 kalite i\u00e7in farkl\u0131 test standard\u0131 yay\u0131mlayabiliyor. Teklif kar\u015f\u0131la\u015ft\u0131r\u0131rken test standard\u0131n\u0131 sorun.<\/p>\n

3.<\/strong> NORSOK MDS numaralar\u0131 kaliteye de\u011fil \u00fcr\u00fcn formuna aittir; ayn\u0131 MDS listesi hem F53 hem F55 i\u00e7in verilir. MDS numaras\u0131 tek ba\u015f\u0131na kaliteyi belirlemez.<\/p>\n<\/div>\n

Nerede kullan\u0131l\u0131r?<\/h3>\n

\u0130kisi de a\u00e7\u0131k deniz petrol-gaz, deniz suyu so\u011futma, tuzdan ar\u0131nd\u0131rma, baca gaz\u0131 k\u00fck\u00fcrt giderme, ka\u011f\u0131t hamuru ve kimyasal proses ekipman\u0131nda kullan\u0131l\u0131r. F55’in bak\u0131r\u0131 asit ortam\u0131nda, F53’\u00fcn y\u00fcksek azotu ise mukavemet ve kaynak sonras\u0131 performans taraf\u0131nda \u00f6ne \u00e7\u0131kar.<\/p>\n

G\u00f6sterimler, standartlar ve AMS kar\u015f\u0131l\u0131klar\u0131<\/h3>\n

Ayn\u0131 \u00e7elik, hangi sistemde konu\u015ftu\u011funuza g\u00f6re farkl\u0131 isimle an\u0131l\u0131r. Sipari\u015f ve sertifika kar\u0131\u015f\u0131kl\u0131klar\u0131n\u0131n \u00e7o\u011fu buradan \u00e7\u0131kar, o y\u00fczden k\u0131saca \u00f6zetleyelim:<\/p>\n