{"id":4123,"date":"2025-06-25T11:34:07","date_gmt":"2025-06-25T08:34:07","guid":{"rendered":"https:\/\/www.defencemetal.com\/?p=4123"},"modified":"2026-09-17T23:07:26","modified_gmt":"2026-09-17T20:07:26","slug":"en-aw-7075-3-4365-alzn5-5mgcu-ams-4078-ams-4124-aluminium-alloy","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/25\/en-aw-7075-3-4365-alzn5-5mgcu-ams-4078-ams-4124-aluminium-alloy\/","title":{"rendered":"EN AW-7075 (3.4365 \/ AlZn5.5MgCu) \u2014 AMS 4078 \/ AMS 4124 Aluminium Alloy"},"content":{"rendered":"<p><!-- dm-urun-link --><\/p>\n<div style=\"border:1px solid #d7dfe4;border-left:3px solid #DD3333;background:#F7FAFB;padding:11px 15px;margin:0 0 20px;font-size:14px;line-height:1.55\"><strong style=\"color:#12303f\">We supply EN AW 7075.<\/strong> For dimensions, standard equivalents, stock and quotations, take a look at the <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/en-aw-7075\/\"><strong>EN AW 7075 product page<\/strong><\/a>.<\/div>\n<p><!-- \/dm-urun-link --><\/p>\n<h3><b>EN AW-7075 (AlZn5.5MgCu): An Aerospace Grade High Strength Aluminium Alloy<\/b><\/h3>\n<h3><b>Alloy Definition and Chemical Composition<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\">EN AW-7075<\/span> is one of the materials with the highest mechanical strength among the 7xxx series aluminium alloys. This alloy has been formulated to be suitable for precipitation hardening, especially with the additions of <span class=\"s2\">zinc (Zn)<\/span>, <span class=\"s2\">magnesium (Mg)<\/span> and <span class=\"s2\">copper (Cu)<\/span>. 7075 is generally preferred as an alternative to steel in applications requiring a high strength-to-weight ratio.<\/p>\n<p class=\"p4\"><b>Its typical chemical composition (% by weight):<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><b>Aluminium (Al):<\/b><span class=\"s1\"> Balance<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Zinc (Zn):<\/b><\/span> 5.1 \u2013 6.1%<\/li>\n<li class=\"p1\"><b>Magnesium (Mg):<\/b><span class=\"s1\"> 2.1 \u2013 2.9%<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Copper (Cu):<\/b><\/span> 1.2 \u2013 2.0%<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Chromium (Cr):<\/b><\/span> 0.18 \u2013 0.28%<\/li>\n<li class=\"p1\"><b>Iron (Fe), Silicon (Si):<\/b><span class=\"s1\"> Max. 0.5 \u2013 0.4%<\/span><\/li>\n<li class=\"p1\"><b>Manganese, Titanium:<\/b><span class=\"s1\"> In trace amounts<\/span><\/li>\n<\/ul>\n<p class=\"p4\"><span class=\"s3\">The high strength of this alloy is obtained through <\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/Precipitation_hardening\"><b>precipitation hardening<\/b><\/a><span class=\"s3\"> and <\/span><b>temper operations such as T6 or T73<\/b><span class=\"s3\">.<\/span><\/p>\n<hr>\n<h3><b>EN AW-7075 Standards and Specifications<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>EN AW-7075<\/b><\/span> has been defined in many international norms:<\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>EN 573-3<\/b><\/span> \u2013 Chemical composition<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>EN 485-2 \/ EN 755-2<\/b><\/span> \u2013 Mechanical properties (sheet, profile)<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>EN 515<\/b><\/span> \u2013 Temper classifications<\/li>\n<li class=\"p1\"><b>ASTM B209 \/ B221<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>UNS A97075<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>DIN 3.4365<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>AMS 4045 \/ AMS 4078 \/ AMS 4339<\/b><span class=\"s1\"> \u2013 (aerospace grade)<\/span><\/li>\n<\/ul>\n<p class=\"p4\"><b>Temper codes:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>T6:<\/b><\/span> Solution treated and artificially aged (maximum hardness)<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>T73:<\/b><\/span> Temper with increased resistance to temperature<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>T651:<\/b><\/span> Stress relieved, plate form<\/li>\n<\/ul>\n<hr>\n<h3><b>EN AW-7075 Trade Names and Equivalents<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>EN AW-7075<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>AlZn5.5MgCu<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>AA7075<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>UNS A97075<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>DIN 3.4365<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>Ergal 7075 (especially in the European aerospace sector)<\/b><\/li>\n<\/ul>\n<hr>\n<h3><b>EN AW-7075 Mechanical and Physical Properties<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>T6 temper<\/b><\/span> \u2014 characteristic mechanical properties:<\/p>\n<ul>\n<li class=\"p1\"><b>Tensile Strength (Rm):<\/b><span class=\"s1\"> 510 \u2013 580 MPa<\/span><\/li>\n<li class=\"p1\"><b>Yield Strength (Rp0.2):<\/b><span class=\"s1\"> 430 \u2013 500 MPa<\/span><\/li>\n<li class=\"p1\"><b>Elongation (A50):<\/b><span class=\"s1\"> 7 \u2013 10%<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Density:<\/b><\/span> 2.81 g\/cm\u00b3<\/li>\n<li class=\"p1\"><b>Modulus of Elasticity:<\/b><span class=\"s1\"> 71.7 GPa<\/span><\/li>\n<li class=\"p1\"><b>Hardness (Brinell):<\/b><span class=\"s1\"> ~150 HB<\/span><\/li>\n<li class=\"p1\"><b>Melting Point:<\/b><span class=\"s1\"> 477 \u2013 635 \u00b0C<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Thermal Conductivity:<\/b><\/span> 130 \u2013 160 W\/m\u00b7K<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Fatigue Strength:<\/b><\/span> High (especially in the T73 temper)<\/li>\n<\/ul>\n<p class=\"p3\">This alloy offers one of the highest strength levels in the aluminium family and provides performance rivalling that of steel.<\/p>\n<hr>\n<h3><b>Application Areas<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>EN AW-7075<\/b><\/span> finds a broad area of use in applications requiring <span class=\"s2\"><b>extreme strength<\/b><\/span> together with lightness:<\/p>\n<p class=\"p1\"><b>1.Aerospace Industry<\/b><b><\/b><\/p>\n<p class=\"p1\">#Aircraft fuselage fittings<br \/>\n#Landing gear components<br \/>\n#Helicopter rotor systems<\/p>\n<p class=\"p1\"><b>2.Defence and Ballistic Systems<\/b><b><\/b><\/p>\n<p class=\"p1\">#Lightweight armour plates<br \/>\n#Weapon parts and frames<\/p>\n<p class=\"p1\"><b>3.Automotive and Motorsport<\/b><\/p>\n<p><b><\/b>#Suspension components<br \/>\n#Wheels, chassis reinforcements<\/p>\n<p class=\"p1\"><b>4.Bicycle and Sports Equipment<\/b><b><\/b><\/p>\n<p class=\"p1\">#High performance bicycle frames<br \/>\n#Climbing equipment and carabiners<\/p>\n<p class=\"p1\"><b>5.Mould and Machine Parts<\/b><b><\/b><\/p>\n<p class=\"p1\">#High strength mould plates<br \/>\n#CNC machined high precision parts<\/p>\n<hr>\n<h3><b>Advantages<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>Superior Strength \/ Weight Ratio: <\/b>With this property it is preferred instead of steel in the aerospace sector.<\/li>\n<li class=\"p1\"><b>Good Machinability: <\/b><b><\/b>It provides excellent CNC machinability especially in the T6 temper<\/li>\n<li class=\"p1\"><b>Suitability for Heat Treatment: <\/b><b><\/b>Properties can be customised with temper operations.<\/li>\n<li class=\"p1\"><b>High Fatigue Strength: <\/b><b><\/b>It provides long-term performance under dynamic load.<\/li>\n<\/ul>\n<hr>\n<h3><b>Disadvantages<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>Poor Corrosion Resistance: <\/b>Because of the copper content in particular, it needs to be protected against atmospheric and galvanic corrosion. It is generally supported with alodine coating or anodising.<\/li>\n<li class=\"p1\"><b>Poor Weldability: <\/b>It is not suitable for MIG\/TIG welding. A loss of strength occurs after welding.<\/li>\n<li class=\"p1\"><b>High Price: <\/b>It is more expensive than other aluminium alloys; consequently it is preferred only in applications requiring high performance.<\/li>\n<\/ul>\n<hr>\n<h3><b>Conclusion and Engineering Evaluation<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>EN AW-7075<\/b><\/span> is an ideal solution for situations in engineering applications where <span class=\"s2\"><b>strength is the most critical parameter<\/b><\/span>. It stands out as a strategic material especially in sectors such as aerospace, defence and motorsport, thanks to offering performance close to steel at a much lower weight.<\/p>\n<p class=\"p3\">Alongside the expectation of high performance, however, limiting factors such as corrosion resistance and weldability should be assessed carefully. These limitations can be overcome with the correct temper selection, surface treatments and joining methods. Ultimately 7075 is an <span class=\"s2\"><b>alloy that is indispensable in high cost but critical projects where high engineering expectations are met<\/b><\/span>.<\/p>\n<p>&nbsp;<\/p>\n<h5>#ENAW7075<br \/>\n#AMSQQ-A-250\/12<br \/>\n#AMSQQ-A-225\/9<br \/>\n#AMS4078<br \/>\n#AMS4124<br \/>\n#ASTMB209<br \/>\n#ASTMB211<br \/>\n#AIR9048-690<br \/>\n#3.4364<\/h5>\n<p>&nbsp;<\/p>\n<p><!-- dm-tablo --><\/p>\n<div class=\"dm-tablo\" style=\"border:1px solid #d7dfe4;background:#ffffff;margin:24px 0 18px;\">\n<div style=\"background:#DD3333;color:#ffffff;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:10px 12px;line-height:1.35;\">Chemical Composition \u00b7 EN AW 7075 (3.4365)<\/div>\n<div style=\"padding:2px 12px 8px;\">\n<table id=\"tablepress-2\" class=\"tablepress tablepress-id-2\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Kimyasal Kompozisyon<strong><\/th><th class=\"column-2\">% De\u011fer<\/th><th class=\"column-3\">Fiziksel \u00d6zellikler<\/th><th class=\"column-4\">% De\u011fer<\/th><th class=\"column-5\">Mekanik \u00d6zellikler<\/th><th class=\"column-6\">De\u011fer<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Silicon (Si)<\/td><td class=\"column-2\">0,00 \u2013 0,40<\/td><td class=\"column-3\">Yo\u011funluk<\/td><td class=\"column-4\">2.81 g\/cm\u00b3<\/td><td class=\"column-5\">Akma Dayan\u0131m\u0131<\/td><td class=\"column-6\">410 MPa<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Tin (Sn)<\/td><td class=\"column-2\">0,00 \u2013 0,00<\/td><td class=\"column-3\">Erime S\u0131cakl\u0131\u011f\u0131<\/td><td class=\"column-4\">477 \u00b0C<\/td><td class=\"column-5\">\u00c7ekme Dayan\u0131m\u0131<\/td><td class=\"column-6\">510 MPa<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Chromium (Cr)<\/td><td class=\"column-2\">0,18 \u2013 0,28<\/td><td class=\"column-3\">Is\u0131l Genle\u015fme K.<\/td><td class=\"column-4\">23 x 10^-6 \/K<\/td><td class=\"column-5\">Kesme Dayan\u0131m\u0131<\/td><td class=\"column-6\">300 MPa<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Manganese (Mn)<\/td><td class=\"column-2\">0,00 \u2013 0,30<\/td><td class=\"column-3\">Elastisite Mod\u00fcl\u00fc<\/td><td class=\"column-4\">72 GPa<\/td><td class=\"column-5\">Uzama<\/td><td class=\"column-6\">8%<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">Magnesium (Mg)<\/td><td class=\"column-2\">2,10 \u2013 2,90<\/td><td class=\"column-3\">Is\u0131l Kapasite<\/td><td class=\"column-4\">155 W\/m.K<\/td><td class=\"column-5\">Elastisite<\/td><td class=\"column-6\">72 GPa<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Copper (Cu)<\/td><td class=\"column-2\">1,20 \u2013 2,00<\/td><td class=\"column-3\">Elektriksel \u0130letkenlik<\/td><td class=\"column-4\">%33 IACS<\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">Lead (Pb)<\/td><td class=\"column-2\">0,00 - 0,00<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">Titanium (Ti)<\/td><td class=\"column-2\">0,00 \u2013 0,20<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">Iron (Fe)<\/td><td class=\"column-2\">0,00 \u2013 0,50<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">Zinc (Zn)<\/td><td class=\"column-2\">5,10 \u2013 6,10<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-12\">\n\t<td class=\"column-1\">Nickel (Ni)<\/td><td class=\"column-2\">0,00 \u2013 0,00<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-13\">\n\t<td class=\"column-1\">Aluminium (Al)<\/td><td class=\"column-2\">Balance<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<tr class=\"row-14\">\n\t<td class=\"column-1\">Titanium + Zirconium (Ti+Zr)<\/td><td class=\"column-2\">0,00 - 0,25<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td><td class=\"column-5\"><\/td><td class=\"column-6\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-2 from cache --><\/div>\n<\/div>\n<p><!-- \/dm-tablo --><\/p>\n<p><!-- dm-ic-baglanti --><\/p>\n<div class=\"dm-ic-baglanti\" style=\"margin:28px 0 0;border:1px solid #e0e0e0;border-left:4px solid #DD3333;background:#FAFAFA;padding:16px 18px;\">\n<p style=\"font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#DD3333;margin:0 0 6px;line-height:1.4;\">We supply this material<\/p>\n<p style=\"margin:0 0 12px;font-size:15px;line-height:1.65;color:#333;\">We supply EN AW 7075 (3.4365) \u2014 to AMS 4045, AMS 4078 standards, in the dimensions and forms required. For stock availability and pricing:<\/p>\n<p><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/en-aw-7075\/\" style=\"display:inline-block;color:#ffffff;background:#24BEE5;text-decoration:none;font-weight:600;font-size:14px;padding:10px 17px;line-height:1.2;\">EN AW 7075 product page \u2192<\/a>\n<\/div>\n<p><!-- \/dm-ic-baglanti --><\/p>\n<p><!-- dm-benzer --><\/p>\n<div class=\"dm-benzer\" style=\"margin:22px 0 0;padding:14px 16px;border:1px solid #e0e0e0;background:#FBFCFD;\">\n<p style=\"font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#9aa3a8;margin:0 0 8px;line-height:1.4;\">Similar products<\/p>\n<p style=\"margin:0;font-size:15px;line-height:2;color:#333;\"><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/en-aw-2017a\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">EN AW 2017A<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/en-aw-5083\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">EN AW 5083<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/en-aw-5754\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">EN AW 5754<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/en-aw-6060\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">EN AW 6060<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aluminium-alloys\/\" style=\"color:#666;font-weight:600;text-decoration:none;\">All aluminium alloys \u2192<\/a><\/p>\n<\/div>\n<p><!-- \/dm-benzer --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>EN AW-7075 (3.4365 \/ AlZn5.5MgCu \/ AA7075) is an aerospace grade 7xxx series aluminium alloy reaching 510-580 MPa in T6. Chemical composition, T6 \/ T73 \/ T651 tempers, mechanical and physical properties, EN 573-3 \/ ASTM B209 and AMS 4045, AMS 4078 standards, aerospace, defence, motorsport and mould applications.<\/p>\n","protected":false},"author":1,"featured_media":2111,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4123","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>EN AW-7075 (3.4365 \/ AlZn5.5MgCu) \u2014 AMS 4078 \/ AMS 4124 Aluminium Alloy - Defence Metal<\/title>\n<meta name=\"description\" content=\"EN AW-7075 (3.4365 \/ AlZn5.5MgCu \/ AA7075) is an aerospace grade 7xxx series aluminium alloy reaching 510-580 MPa in T6.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/25\/en-aw-7075-3-4365-alzn5-5mgcu-ams-4078-ams-4124-aluminium-alloy\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"EN AW-7075 (3.4365 \/ AlZn5.5MgCu) \u2014 AMS 4078 \/ AMS 4124 Aluminium Alloy - 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