{"id":6214,"date":"2026-09-25T19:52:49","date_gmt":"2026-09-25T16:52:49","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/25\/aisi-434-aisi-430-farki\/"},"modified":"2026-09-30T10:44:17","modified_gmt":"2026-09-30T07:44:17","slug":"aisi-434-aisi-430-farki","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2026\/09\/25\/aisi-434-aisi-430-farki\/","title":{"rendered":"AISI 434 ile AISI 430 Aras\u0131ndaki Fark Nedir?"},"content":{"rendered":"

AISI 434<\/strong> ile AISI 430<\/strong> aras\u0131nda en s\u0131k yap\u0131lan hata, 434’\u00fc “daha y\u00fcksek kromlu 430” sanmakt\u0131r. Do\u011fru de\u011fildir: iki \u00e7eli\u011fin krom band\u0131 birebir ayn\u0131d\u0131r<\/strong> (%16,00 – 18,00). Tek kas\u0131tl\u0131 fark molibdendir<\/strong>.<\/p>\n

Molibden ne kazand\u0131r\u0131yor?<\/h3>\n

Molibden, klor\u00fcr i\u00e7eren ortamlarda \u00e7ukurcuk korozyonuna kar\u015f\u0131 direnci art\u0131r\u0131r. AISI 434’te molibden %0,75 – 1,25<\/strong> (ASTM S43400) veya %0,90 – 1,40<\/strong> (EN 1.4113) aral\u0131\u011f\u0131ndad\u0131r; AISI 430’da hi\u00e7 yoktur.<\/p>\n

Uluslararas\u0131 Paslanmaz \u00c7elik Forumu’nun (ISSF) verdi\u011fi yakla\u015f\u0131k ili\u015fki bu fark\u0131 somutla\u015ft\u0131r\u0131yor: %1 fazladan molibden, \u00e7ukurcuk korozyonu direncini yakla\u015f\u0131k %3,3 fazladan kromun sa\u011flad\u0131\u011f\u0131 kadar art\u0131r\u0131r.<\/em><\/p>\n

Bunun klasik uygulamas\u0131 otomotiv d\u0131\u015f donan\u0131m\u0131d\u0131r. Cleveland-Cliffs, 430’u “hafif ko\u015fullar i\u00e7in giri\u015f seviyesi %17 krom ferritik” olarak tan\u0131mlay\u0131p esas olarak i\u00e7 mek\u00e2n veya tamamen kapal\u0131<\/em> par\u00e7alarda kullan\u0131ld\u0131\u011f\u0131n\u0131; buz \u00e7\u00f6z\u00fcc\u00fc tuzlara kar\u015f\u0131 ek koruma gerekti\u011finde 434 ve 436 gibi molibdenli kalitelere ge\u00e7ildi\u011fini<\/strong> belirtiyor.<\/p>\n

Rakamlarla kar\u015f\u0131la\u015ft\u0131rma<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00d6ZELL\u0130K<\/th>\nAISI 434 (1.4113)<\/th>\nAISI 430 (1.4016)<\/th>\n<\/tr>\n<\/thead>\n
Yap\u0131<\/td>\nferritik<\/td>\nferritik<\/td>\n<\/tr>\n
Krom (Cr)<\/strong><\/td>\n%16,00 – 18,00<\/strong><\/td>\n%16,00 – 18,00<\/strong><\/td>\n<\/tr>\n
Molibden (Mo)<\/strong><\/td>\n%0,75 – 1,25 (ASTM)
%0,90 – 1,40 (EN)<\/strong><\/td>\n		yok<\/strong><\/td>\n<\/tr>\n
Karbon (C)<\/td>\nmax %0,08 (EN 1.4113)<\/td>\nmax %0,08 (EN) \/ max %0,12 (ASTM)<\/td>\n<\/tr>\n
Mangan (Mn)<\/td>\nmax %1,00<\/td>\nmax %1,00<\/td>\n<\/tr>\n
Manyetik<\/td>\nevet<\/td>\nevet<\/td>\n<\/tr>\n
Is\u0131l i\u015flemle sertle\u015fme<\/td>\nhay\u0131r<\/td>\nhay\u0131r<\/td>\n<\/tr>\n
Klor\u00fcr \/ yol tuzu direnci<\/td>\ndaha y\u00fcksek<\/td>\ndaha d\u00fc\u015f\u00fck<\/td>\n<\/tr>\n
Tipik kullan\u0131m<\/td>\nd\u0131\u015f donan\u0131m, g\u00f6r\u00fcn\u00fcr par\u00e7a<\/td>\ni\u00e7 mek\u00e2n, kapal\u0131 par\u00e7a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Kaynak ve \u015fekillendirme<\/h3>\n

Her iki kalite de yayg\u0131n ergitme ve diren\u00e7 kayna\u011f\u0131 y\u00f6ntemleriyle kaynaklanabilir, ancak \u0131s\u0131dan etkilenen b\u00f6lgenin s\u00fcnekli\u011fini ve korozyon direncini geri kazanmak i\u00e7in kaynak sonras\u0131 tavlama gerekir<\/strong>.<\/p>\n

\u015eekillendirmede k\u00fc\u00e7\u00fck ama ticari olarak \u00f6nemli bir not: Cleveland-Cliffs, 434’\u00fcn niyobyumla stabilize edilmi\u015f kalitelere (435 Mod, 436) k\u0131yasla \u00e7ekme s\u0131ras\u0131nda “halatlanma” (roping) e\u011filiminin biraz daha y\u00fcksek<\/strong> oldu\u011funu belirtiyor. G\u00f6r\u00fcn\u00fcr y\u00fczeyli derin \u00e7ekme par\u00e7alar\u0131nda bu dikkate al\u0131nmal\u0131d\u0131r.<\/p>\n

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

EN 1.4113 ile UNS S43400 birebir ayn\u0131 de\u011fildir.<\/p>\n

Molibden EN’de %0,90–1,40, ASTM’de %0,75–1,25’tir. 1.4113 sertifikal\u0131 malzeme her zaman S43400’\u00fcn molibden \u015fart\u0131n\u0131 kar\u015f\u0131lar; tersi do\u011fru de\u011fildir<\/strong> — %0,75 molibdenli bir d\u00f6k\u00fcm S43400’\u00fc ge\u00e7er, 1.4113’ten kal\u0131r. Karbon tavan\u0131 da farkl\u0131d\u0131r (EN %0,08, ASTM A240 %0,12).<\/p>\n<\/div>\n

\n

\u0130ki uyar\u0131 daha<\/p>\n

1.<\/strong> 434’\u00fcn ASTM A240 tavl\u0131 akma dayan\u0131m\u0131 minimumu kaynaklar aras\u0131nda tart\u0131\u015fmal\u0131d\u0131r: SSINA 240 MPa (35 ksi), Ulbrich 205 MPa (30 ksi) veriyor. Hangi de\u011fere g\u00f6re tasarl\u0131yorsan\u0131z onu ve kayna\u011f\u0131n\u0131 \u015fartnameye yaz\u0131n.<\/p>\n

2.<\/strong> Yaln\u0131zca buz \u00e7\u00f6z\u00fcc\u00fc tuz direnci ar\u0131yorsan\u0131z 434 tek se\u00e7enek de\u011fildir: Cleveland-Cliffs, molibden i\u00e7ermeyen %19 kromlu 435 Mod (UNS S44500)<\/strong> kalitesinin 434 ve 436’ya benzer tuz direnci sa\u011flad\u0131\u011f\u0131n\u0131 belirtiyor. Teklif al\u0131rken bunu da sorun.<\/p>\n<\/div>\n

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

AISI 434:<\/strong> otomotiv d\u0131\u015f donan\u0131m ve bijon kapaklar\u0131, ku\u015fak hatt\u0131 ve direk kaplamalar\u0131, cam \u00e7er\u00e7eveleri, beyaz e\u015fya, mimari bile\u015fenler, s\u0131cak su depolar\u0131, g\u00fcne\u015f enerjili su \u0131s\u0131t\u0131c\u0131lar\u0131, g\u00f6r\u00fcn\u00fcr egzoz par\u00e7alar\u0131, davlumbaz ve end\u00fcstriyel mutfak ekipman\u0131.<\/p>\n

AISI 430:<\/strong> beyaz e\u015fya, mutfak ekipman\u0131, mimari i\u00e7 kaplama, g\u0131da ve s\u00fct ekipman\u0131, i\u00e7 mek\u00e2n veya kapal\u0131 otomotiv par\u00e7alar\u0131.<\/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