{"id":2947,"date":"2026-09-15T11:31:59","date_gmt":"2026-09-15T08:31:59","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/300m\/"},"modified":"2026-09-25T16:30:53","modified_gmt":"2026-09-25T13:30:53","slug":"300m","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/300m\/","title":{"rendered":"300M"},"content":{"rendered":"

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300M \/ AMS 6257 \/ AMS 6417<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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300M<\/div>\n
UNS K44220 \u00b7 300M \u00b7 4340M \u00b7 E4340 Mod \u00b7 SAE 434M \u00b7 BS S155. DO\u011eRULANMI\u015e B\u0130R W.Nr.\/EN NUMARASI YOKTUR; sipari\u015f UNS K44220 ve AMS numaras\u0131 \u00fczerinden verilir. 300M, AISI 4340’\u0131n S\u0130L\u0130SYUM VE VANADYUM \u0130LAVEL\u0130 t\u00fcrevidir: 4340’\u0131n Cr-Ni-Mo iskeleti korunur, silisyum %0,15-0,35 band\u0131ndan %1,45-1,80’e \u00c7IKARILIR, %0,05-0,10 vanadyum eklenir ve molibden %0,20-0,30’dan %0,30-0,50’ye y\u00fckseltilir. B\u0130LE\u015e\u0130M AMS NUMARASINA G\u00d6RE DE\u011e\u0130\u015e\u0130R ve fark KARBONDADIR: AMS 6417 C %0,38-0,43 \u00b7 AMS 6419 C %0,40-0,45 \u00b7 AMS 6257 C %0,40-0,44. Di\u011fer elementler \u00fc\u00e7 numarada da SAE ba\u015fl\u0131k kayd\u0131na g\u00f6re ayn\u0131d\u0131r: 1,6Si \u2013 0,82Cr \u2013 1,8Ni \u2013 0,40Mo \u2013 0,08V nominal. Havac\u0131l\u0131k kalitesinde fosfor ve k\u00fck\u00fcrt tavanlar\u0131 s\u0131k\u0131d\u0131r (SSA ve Lork: P en \u00e7ok %0,010, S en \u00e7ok %0,008) ve \u00dc\u00c7 AMS NUMARASININ \u00dc\u00c7\u00dc DE SARF ELEKTROT VAKUM YEN\u0130DEN ERG\u0130TME (consumable electrode vacuum remelted, VAR) \u015eARTI TA\u015eIR. MARTENZ\u0130T\u0130K ISLAH \u00c7EL\u0130\u011e\u0130D\u0130R: \u00f6stenitleme + ya\u011fa su verme + \u00c7\u0130FT TEMPERLEME ile sertle\u015fir. \u00c7\u00d6KELME SERTLE\u015eMEZ; H900 \/ H1025 benzeri bir ya\u015fland\u0131rma kademesi YOKTUR. PASLANMAZ DE\u011e\u0130LD\u0130R.<\/div>\n
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Kar\u0131\u015ft\u0131r\u0131lmamas\u0131 gerekenler<\/div>\n

AISI 4340<\/a>AerMet 100<\/a><\/div>\n<\/div>\n

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Ne i\u00e7in<\/div>\n
Kal\u0131n kesitte 1860-1930 MPa \u00e7ekme dayan\u0131m\u0131 istenen, a\u011f\u0131rl\u0131\u011f\u0131 kritik ve k\u0131r\u0131lmas\u0131 u\u00e7a\u011f\u0131 kaybettirecek birincil yap\u0131 par\u00e7alar\u0131 i\u00e7in al\u0131n\u0131r. Bask\u0131n uygulama U\u00c7AK \u0130N\u0130\u015e TAKIMIDIR: amortis\u00f6r d\u0131\u015f silindiri, i\u00e7 mil, aks, pim ve ba\u011flant\u0131 kulaklar\u0131.<\/div>\n<\/div>\n
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Formlar<\/div>\n
Yuvarlak \u00e7ubuk \u00b7 lama \u00b7 levha \u00b7 sac \u00b7 boru \u00b7 d\u00f6vme. T\u00fcm formlar sipari\u015f baz\u0131nda temin edilmektedir. AMS kapsam\u0131 YALNIZCA \u00e7ubuk, d\u00f6vme, d\u00f6vme k\u00fct\u00fc\u011f\u00fc ve MEKAN\u0130K borudad\u0131r; levha, sac ve \u015ferit i\u00e7in bu ala\u015f\u0131mda do\u011frulanm\u0131\u015f bir AMS numaras\u0131 yoktur (standart haritas\u0131na bak\u0131n\u0131z).<\/div>\n<\/div>\n
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Standartlar<\/div>\n
AMS (\u00fc\u00e7\u00fc de do\u011frulanm\u0131\u015f, \u00fc\u00e7\u00fc de SARF ELEKTROT VAKUM YEN\u0130DEN ERG\u0130TME \u015fartl\u0131d\u0131r): AMS 6417<\/b> \u2014 ‘Steel, Bars, Forgings, and Tubing, 1.6Si – 0.82Cr – 1.8Ni – 0.40Mo – 0.08V (0.38 – 0.43C), Consumable Electrode Vacuum Remelted’; kapsam \u00e7ubuk, d\u00f6vme, mekanik boru ve d\u00f6vme k\u00fct\u00fc\u011f\u00fc; g\u00fcncel revizyon K-2021. \u00b7 AMS 6419<\/b> \u2014 ayn\u0131 ba\u015fl\u0131k, KARBON BANDI %0,40-0,45; g\u00fcncel revizyon K-2021. \u00b7 AMS 6257<\/b> \u2014 ‘Steel Bars, Forgings, Forging Stock, and Mechanical Tubing 1.6Si – 0.82Cr – 1.8Ni – 0.40Mo – 0.08V (0.40 – 0.44C) Consumable Electrode Vacuum Remelted NORMALIZED AND TEMPERED’; g\u00fcncel revizyon G-2022. Bu numara TESL\u0130M DURUMU \u015fartnamesidir: malzeme normalize ve temperlenmi\u015f olarak teslim edilir. Yerini ald\u0131\u011f\u0131 asker\u00ee \u015fartnameler (SSA): AMS 6417<\/b> \u2190 MIL-S-83135 \u00b7 AMS 6257<\/b> \u2190 MIL-S-8844 Rev D S\u0131n\u0131f 3. Di\u011fer asker\u00ee ve OEM \u015fartnameleri: MIL-S-8844 S\u0131n\u0131f 3 \u00b7 BMS 7-26 S\u0131n\u0131f 1 (Boeing) \u00b7 DMS 1935 \u00b7 CE-0896 \u00b7 GM-1012 \u00b7 LC-05-1190 \u00b7 BS S155. ASTM: d\u00f6rt ba\u011f\u0131ms\u0131z kaynakta bu ala\u015f\u0131ma ait bir ASTM numaras\u0131 DO\u011eRULANAMAMI\u015eTIR; ASTM YAZILMAMI\u015eTIR.
AMS 6417 VE AMS 6419 = 300M’D\u0130R, D\u00dcZ 4340 DE\u011e\u0130LD\u0130R. Bu, 4340 taraf\u0131nda en s\u0131k yap\u0131lan kar\u0131\u015ft\u0131rmad\u0131r. SAE ba\u015fl\u0131k kay\u0131tlar\u0131n\u0131n ikisi de ala\u015f\u0131m\u0131 ‘1.6Si – 0.82Cr – 1.8Ni – 0.40Mo – 0.08V’ olarak tan\u0131mlar; d\u00fcz 4340’\u0131n silisyumu %0,15-0,35’tir ve vanadyumu yoktur.<\/span><\/div>\n<\/div>\n
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Art\u0131s\u0131<\/div>\n
Tek en \u00f6nemli pratik \u00fcst\u00fcnl\u00fc\u011f\u00fc, silisyumun getirdi\u011fi TEMPERLEME D\u0130RENC\u0130D\u0130R ve bunun iki somut sonucu vard\u0131r. B\u0130R\u0130NC\u0130S\u0130 MUKAVEMET TAVANI: AMS 6417 taban\u0131 1862 MPa \u00e7ekme \/ 1517 MPa akma, AMS 6419 taban\u0131 1931 MPa \u00e7ekme \/ 1586 MPa akmad\u0131r;<\/div>\n<\/div>\n
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Kaynak<\/div>\n
KAYNAK ED\u0130LEB\u0130L\u0130R AMA HAVACILIK PAR\u00c7ALARINDA GENELL\u0130KLE KA\u00c7INILIR. Supreme Steels do\u011frudan yazar: ‘Welding is possible with preheat and post-weld heat treatment’, ‘improper welding reduces toughness and strength’ ve kritik par\u00e7alarda ‘shops often avoid welding and use forged or machined blanks\u2026<\/div>\n<\/div>\n
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S\u0131n\u0131rlar\u0131<\/div>\n
1) PASLANMAZ DE\u011e\u0130LD\u0130R. Kromu %0,70-0,95’tir ve pasif tabaka olu\u015fturmaz. Dynamic Metals, 300M’in korozif ortamlarda koruma gerektirdi\u011fini ve gerilmeli korozyon \u00e7atla\u011f\u0131na dayan\u0131m\u0131n\u0131n zay\u0131f oldu\u011funu yazar. Kaplama, kadmiyum\/alternatifi veya boya ile KORUMA ZORUNLUDUR.<\/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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