{"id":3038,"date":"2026-09-15T15:09:09","date_gmt":"2026-09-15T12:09:09","guid":{"rendered":"https:\/\/www.defencemetal.com\/?page_id=3038"},"modified":"2026-09-25T19:57:18","modified_gmt":"2026-09-25T16:57:18","slug":"aisi-8740","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/aisi-8740\/","title":{"rendered":"AISI 8740 \/ AMS 6322 \/ AMS 6325"},"content":{"rendered":"

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AISI 8740 \/ AMS 6322 \/ AMS 6325<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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AISI 8740<\/div>\n
UNS G87400 (sertle\u015febilirlik band\u0131 kalitesi 8740H = H87400) \u00b7 W.Nr. 1.6546 \/ 40NiCrMo2-2 (kar\u015f\u0131la\u015ft\u0131rma tablolar\u0131nda DIN ad\u0131 40NiCrMo22, UNI 40NiCrMo2, JIS SNCM240 \u2014 \u00dc\u00c7 KAYNAKTA BULUNDU, bant birebir do\u011frulanamad\u0131) \u00b7 SAE J404 \/ ASTM A29 band\u0131: C %0,38-0,43 \u2013 Mn %0,75-1,00 \u2013 Si %0,15-0,35 \u2013 Ni %0,40-0,70 \u2013 Cr %0,40-0,60 \u2013 Mo %0,20-0,30 \u2013 P en \u00e7ok %0,035 \u2013 S en \u00e7ok %0,040 \u2013 kalan Fe. AMS 6322 kimyas\u0131 ayn\u0131 band\u0131 daha s\u0131k\u0131 safs\u0131zl\u0131k s\u0131n\u0131r\u0131yla verir: P en \u00e7ok %0,025, S en \u00e7ok %0,025, Cu en \u00e7ok %0,35. AMS ba\u015fl\u0131klar\u0131ndaki nominal g\u00f6sterim 0,50Cr \u2013 0,55Ni \u2013 0,25Mo (%0,38-0,43 C). ISLAH (SU VERME + TEMPERLEME) \u00c7EL\u0130\u011e\u0130D\u0130R \u2014 SEMENTASYON \u00c7EL\u0130\u011e\u0130 DE\u011e\u0130LD\u0130R. Karbonu %0,38-0,43’t\u00fcr; bu, karb\u00fcrleme i\u00e7in fazla y\u00fcksektir. Ayn\u0131 87xx ailesinden g\u00f6r\u00fcnen 8620’nin karbonu %0,18-0,23’t\u00fcr ve o bir sementasyon \u00e7eli\u011fidir; \u0130K\u0130S\u0130 B\u0130RB\u0130R\u0130N\u0130N YER\u0130NE KULLANILMAZ. 8740, 4140 ve 4340 ile ayn\u0131 mant\u0131kta \u00e7al\u0131\u015f\u0131r: \u00f6stenitleme + ya\u011fa su verme + temperleme. PASLANMAZ DE\u011e\u0130LD\u0130R. \u00c7\u00d6KELME SERTLE\u015eMEZ; H900 \/ H1025 \/ H1150 benzeri bir ya\u015fland\u0131rma kademesi YOKTUR.<\/p>\n
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Kar\u0131\u015ft\u0131r\u0131lmamas\u0131 gerekenler<\/div>\n

AISI 4340<\/a><\/div>\n<\/div>\n<\/div>\n

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Ne i\u00e7in<\/div>\n
Is\u0131l i\u015flemle sertle\u015ftirilip temperlenerek kullan\u0131lan, orta-y\u00fcksek mukavemetli ba\u011flant\u0131 eleman\u0131 ve makine par\u00e7alar\u0131 i\u00e7in al\u0131n\u0131r: u\u00e7ak motoru c\u0131vatas\u0131 ve u\u00e7ak ba\u011flant\u0131 eleman\u0131, aks, sondaj tij ba\u011flant\u0131s\u0131, matkap ve rayba g\u00f6vdesi, piston kolu, a\u011f\u0131r hizmet mili.<\/div>\n<\/div>\n
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Formlar<\/div>\n
Yuvarlak \u00e7ubuk \u00b7 lama \u00b7 levha \u00b7 sac \u00b7 boru \u00b7 d\u00f6vme \u00b7 ba\u011flant\u0131 eleman\u0131. T\u00fcm formlar sipari\u015f baz\u0131nda temin edilmektedir.<\/div>\n<\/div>\n
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Standartlar<\/div>\n
AMS (do\u011frulanm\u0131\u015f, 0,50Cr \u2013 0,55Ni \u2013 0,25Mo, C %0,38-0,43 kimyas\u0131): 6322 (\u00c7UBUK, D\u00d6VME, RING VE D\u00d6VME \/ FLA\u015e-KAYNAKLI RING K\u00dcT\u00dc\u011e\u00dc; U\u00c7AK KAL\u0130TES\u0130; son revizyon S\/2023) \u00b7 6323 (MEKAN\u0130K TUBE; son revizyon M\/2017) \u00b7 6325 (\u00c7UBUK VE D\u00d6VME; ISIL \u0130\u015eLEML\u0130, 105 ksi \/ 724 MPa \u00c7EKME) \u00b7 6327 (\u00c7UBUK VE D\u00d6VME; ISIL \u0130\u015eLEML\u0130, 125 ksi \/ 862 MPa \u00c7EKME) \u00b7 6358 (SAC, \u015eER\u0130T VE LEVHA; U\u00c7AK KAL\u0130TES\u0130). Temizlik: AMS 2301<\/b> \u00b7 AMS 2304<\/b>. Is\u0131l i\u015flem prosed\u00fcr\u00fc: AMS 2759<\/b>\/1 (Heat Treatment of Carbon and Low-Alloy Steel Parts). ASTM: A29 \/ A29M (genel \u015fartlar) \u00b7 A322 (standart kalite ala\u015f\u0131ml\u0131 \u00e7ubuk) \u00b7 A331 (so\u011fuk \u00e7ekilmi\u015f \u00e7ubuk) \u00b7 A519 (diki\u015fsiz mekanik tube) \u00b7 A711 (d\u00f6vme k\u00fct\u00fc\u011f\u00fc) \u00b7 A752 (tel \u00e7ubuk) \u00b7 A320 \/ A320M Grade L7C (d\u00fc\u015f\u00fck s\u0131cakl\u0131k c\u0131vatas\u0131). SAE: J404 (kimya) \u00b7 J1268 (H kaliteleri sertle\u015febilirlik bantlar\u0131) \u00b7 J1397. Askeri: MIL-S-6049 \/ AMS-S-6049 (8740 \u00e7ubuk ve yeniden d\u00f6vme k\u00fct\u00fc\u011f\u00fc, u\u00e7ak kalitesi \u2014 AMS-6322, AMS-6325 ve AMS-6327 taraf\u0131ndan y\u00fcr\u00fcrl\u00fckten kald\u0131r\u0131lm\u0131\u015ft\u0131r) \u00b7 MIL-B-6812 (u\u00e7ak c\u0131vatas\u0131). EN \/ di\u011fer: W.Nr. 1.6546 \/ 40NiCrMo2-2 \u00b7 UNI 40NiCrMo2 \u00b7 JIS SNCM240 (\u00fc\u00e7 kaynakl\u0131, bant do\u011frulanmad\u0131).
AMS 6322, 6325 VE 6327 B\u0130RB\u0130R\u0130N\u0130N YER\u0130NE GE\u00c7MEZ. \u00dc\u00e7\u00fcn\u00fcn de kimyas\u0131 ayn\u0131d\u0131r; FARK TESL\u0130M DURUMU VE HEDEF MUKAVEMETT\u0130R. AMS 6322 u\u00e7ak kalitesi \u00e7ubuk, d\u00f6vme ve ringdir ve ‘Stock for Forging or Flash Welded Rings’ ibaresi ta\u015f\u0131r.<\/span><\/div>\n<\/div>\n
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Art\u0131s\u0131<\/div>\n
Ayn\u0131 malzemenin \u00fc\u00e7 ayr\u0131 mukavemet hedefine \u015eARTNAMEYLE ba\u011flanabilmesidir. AMS 6325 malzemeyi 105 ksi (724 MPa) \u00e7ekmeye \u0131s\u0131l i\u015flemlenmi\u015f olarak, AMS 6327 ise 125 ksi (862 MPa) \u00e7ekmeye \u0131s\u0131l i\u015flemlenmi\u015f olarak verir; AMS 6322 ise u\u00e7ak kalitesi teslim durumunu kapsar.<\/div>\n<\/div>\n
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Kaynak<\/div>\n
KAYNAK ED\u0130LEB\u0130L\u0130R, ANCAK \u00d6N TAV GEREK\u0130R. Karbonu %0,38-0,43’t\u00fcr; 4140 ile ayn\u0131 karbon band\u0131ndad\u0131r ve \u00f6n tavs\u0131z kaynakta \u0131s\u0131 tesir b\u00f6lgesi sert ve gevrek martenzite d\u00f6ner.<\/div>\n<\/div>\n
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S\u0131n\u0131rlar\u0131<\/div>\n
1) PASLANMAZ DE\u011e\u0130LD\u0130R. Krom oran\u0131 %0,40-0,60’t\u0131r ve pasif tabaka olu\u015fturmaz. Kaplama, fosfat, ya\u011f veya boya olmadan nemli ortamda paslan\u0131r; deniz ve klor\u00fcrl\u00fc ortam i\u00e7in uygun de\u011fildir.
\n2) SEMENTASYON \u00c7EL\u0130\u011e\u0130 DE\u011e\u0130LD\u0130R VE KARB\u00dcRLENMEZ. En s\u0131k yap\u0131lan kar\u0131\u015ft\u0131rma budur: 8620 ile ayn\u0131 aileden g\u00f6r\u00fcn\u00fcr ama karbonu %0,38-0,43’t\u00fcr.<\/div>\n<\/div>\n
TEKL\u0130F \u0130STE<\/a>T\u00fcm ala\u015f\u0131ml\u0131 \u00e7elikler →<\/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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