{"id":17749,"date":"2026-04-11T03:57:27","date_gmt":"2026-04-10T22:27:27","guid":{"rendered":"https:\/\/aluminiummagazine.com\/mag\/?p=17749"},"modified":"2026-04-16T18:53:51","modified_gmt":"2026-04-16T13:23:51","slug":"aluminium-7050-aluminum-7050-alloy-properties-aerospace","status":"publish","type":"post","link":"https:\/\/aluminiummagazine.com\/mag\/aluminium\/aluminium-7050-aluminum-7050-alloy-properties-aerospace.html","title":{"rendered":"Aluminium 7050 (Aluminum 7050): The Ultimate Aerospace Alloy for Thick Sections"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Aluminium 7050 \u2013 also known as Aluminum 7050 \u2013 is a heat\u2011treatable aluminium\u2011zinc\u2011magnesium\u2011copper alloy that represents the third generation of high\u2011strength 7000 series alloys. Developed specifically for aerospace applications requiring thick sections, 7050 aluminum offers an exceptional combination of high strength, superior fracture toughness, and outstanding resistance to stress\u2011corrosion cracking. It is the material of choice for fuselage frames, wing skins, bulkheads, and other critical structural components in commercial and military aircraft \u2013 including the Boeing 787 and COMAC C919 \u2013 where reliability cannot be compromised.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is Aluminium 7050?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium alloy 7050 is a member of the <strong>7000 series<\/strong> (aluminium\u2011zinc\u2011magnesium\u2011copper) \u2013 the strongest family of aluminium alloys. Like 7075 and 7068, 7050 is a <strong>heat\u2011treatable<\/strong> alloy that achieves its exceptional mechanical properties through controlled thermal processing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What truly distinguishes 7050 is its <strong>lower quench sensitivity<\/strong> compared to earlier 7000 series alloys. While 7075 loses significant strength in sections thicker than approximately 1.5 inches (38 mm), 7050 maintains its mechanical properties in sections up to <strong>6 inches (150 mm) thick<\/strong> and beyond. This unique characteristic makes 7050 the <strong>premium aerospace aluminium for heavy plate applications<\/strong> (3 to 6 inches thick) such as fuselage frames, bulkheads, and wing skins.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 is widely known under designations such as <strong>EN AW\u20117050<\/strong>, <strong>Al Zn6CuMgZr<\/strong>, <strong>UNS A97050<\/strong>, <strong>HE70<\/strong>, <strong>DIN 3.4344<\/strong>, and <strong>AMS 4050\/4201<\/strong>. It has become the <strong>backbone of modern aircraft structures<\/strong> \u2013 from the Boeing 787 Dreamliner to the COMAC C919 \u2013 and is often described as the \u201c<strong>industry\u2019s most difficult aluminium alloy to cast<\/strong>\u201d due to its demanding metallurgical requirements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key Characteristics at a Glance:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Density:<\/strong> 2.6\u20132.8 g\/cm\u00b3<\/li>\n\n\n\n<li><strong>Melting point:<\/strong> 494\u00b0C<\/li>\n\n\n\n<li><strong>Thermal conductivity:<\/strong> 180 W\/m\u00b7K (approximately 40% of copper)<\/li>\n\n\n\n<li><strong>Modulus of elasticity:<\/strong> 70\u201380 GPa<\/li>\n\n\n\n<li><strong>Typical tensile strength (T7651 temper):<\/strong> 524\u2013531 MPa<\/li>\n\n\n\n<li><strong>Typical yield strength (T7651 temper):<\/strong> 455\u2013462 MPa<\/li>\n\n\n\n<li><strong>Electrical conductivity:<\/strong> 40% IACS<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Data compiled from industry specifications<\/em><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Chemical Composition<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 is a zinc\u2011rich alloy with carefully balanced additions of magnesium, copper, and zirconium. The <strong>zirconium<\/strong> (0.08\u20130.15%) \u2013 a key differentiator from 7075 \u2013 refines grain structure and significantly improves toughness and resistance to recrystallisation. The <strong>low silicon and iron<\/strong> limits ensure consistent fracture toughness.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Element<\/th><th class=\"has-text-align-center\" data-align=\"center\">Percentage (%)<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Aluminum (Al)<\/td><td class=\"has-text-align-center\" data-align=\"center\">87.3 \u2013 90.3<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Zinc (Zn)<\/td><td class=\"has-text-align-center\" data-align=\"center\">5.7 \u2013 6.7<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Copper (Cu)<\/td><td class=\"has-text-align-center\" data-align=\"center\">2.0 \u2013 2.6<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Magnesium (Mg)<\/td><td class=\"has-text-align-center\" data-align=\"center\">1.9 \u2013 2.6<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Zirconium (Zr)<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.08 \u2013 0.15<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Silicon (Si)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.12<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Iron (Fe)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.15<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Titanium (Ti)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.06<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Chromium (Cr)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.04<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Manganese (Mn)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.10<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Others (Each)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.05<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Others (Total)<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22640.15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Source: ASTM B209 \/ AMS 4050<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>zinc, magnesium, and copper<\/strong> form fine strengthening precipitates during artificial aging \u2013 the primary strengthening mechanism. The <strong>zirconium<\/strong> addition controls grain structure and enhances toughness, making 7050 particularly suitable for thick\u2011section applications where 7075 would struggle.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Key Properties of Aluminium 7050<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcaa High Strength \u2013 Comparable to 7075<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 delivers very high strength, comparable to 7075 \u2013 but with significantly better performance in thick sections.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Typical Mechanical Properties by Temper:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Temper<\/th><th class=\"has-text-align-center\" data-align=\"center\">Tensile Strength (MPa)<\/th><th class=\"has-text-align-center\" data-align=\"center\">Yield Strength (MPa)<\/th><th class=\"has-text-align-center\" data-align=\"center\">Elongation (%)<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T7451<\/strong> (Plate, 2\u20133 in)<\/td><td class=\"has-text-align-center\" data-align=\"center\">503<\/td><td class=\"has-text-align-center\" data-align=\"center\">434<\/td><td class=\"has-text-align-center\" data-align=\"center\">9<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T7651<\/strong> (Plate, 1\u20131.5 in)<\/td><td class=\"has-text-align-center\" data-align=\"center\">531<\/td><td class=\"has-text-align-center\" data-align=\"center\">462<\/td><td class=\"has-text-align-center\" data-align=\"center\">9<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T76511<\/strong> (Bar)<\/td><td class=\"has-text-align-center\" data-align=\"center\">545<\/td><td class=\"has-text-align-center\" data-align=\"center\">476<\/td><td class=\"has-text-align-center\" data-align=\"center\">7<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T73511<\/strong> (Bar)<\/td><td class=\"has-text-align-center\" data-align=\"center\">483<\/td><td class=\"has-text-align-center\" data-align=\"center\">414<\/td><td class=\"has-text-align-center\" data-align=\"center\">8<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T74511<\/strong> (Bar)<\/td><td class=\"has-text-align-center\" data-align=\"center\">503<\/td><td class=\"has-text-align-center\" data-align=\"center\">434<\/td><td class=\"has-text-align-center\" data-align=\"center\">7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Data from aircraftmaterials.com<\/em><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">In the <strong>T7651 temper<\/strong> \u2013 which offers the highest strength \u2013 7050 aluminium typically exhibits ultimate tensile strength of <strong>524\u2013531 MPa<\/strong> and yield strength of approximately <strong>455\u2013462 MPa<\/strong> with good exfoliation corrosion resistance and average stress\u2011corrosion cracking resistance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\udde0 Superior Fracture Toughness \u2013 The Defining Advantage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This is where <strong>Aluminium 7050 truly excels<\/strong>. Compared to 7075, 7050 offers <strong>significantly better fracture toughness and resistance to crack propagation<\/strong> \u2013 critical properties for damage\u2011tolerant aerospace designs. The alloy exhibits <strong>excellent fatigue performance<\/strong>, making it ideal for components subjected to cyclic loading during flight.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><em>\u201c7050 aluminium offers very high mechanical properties with excellent fracture toughness and resistance to stress corrosion.\u201d<\/em> \u2013 Smiths Advanced<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udee1\ufe0f Outstanding Stress\u2011Corrosion Cracking Resistance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 was specifically designed for structural components subject to high fatigue stress and the risk of corrosion. It provides <strong>excellent resistance to both stress\u2011corrosion cracking (SCC) and exfoliation corrosion<\/strong> \u2013 a critical requirement for aircraft operating in harsh environments.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Two primary tempers offer different balances:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>T7451 temper<\/strong> \u2013 Provides <strong>better SCC resistance<\/strong> and <strong>excellent exfoliation resistance<\/strong> at slightly lower strength levels. This is the preferred temper for most aerospace structural applications where long\u2011term corrosion reliability is paramount.<\/li>\n\n\n\n<li><strong>T7651 temper<\/strong> \u2013 Combines the <strong>highest strength<\/strong> with good exfoliation corrosion resistance and <strong>average SCC resistance<\/strong> \u2013 suitable for less corrosion\u2011critical applications.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Source: TW Metals \/ Alcoa<\/em><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udccf Exceptional Thick\u2011Section Performance \u2013 The Unique Advantage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike 7075, which loses strength rapidly in sections thicker than approximately 1.5 inches, <strong>7050 maintains its mechanical properties in sections up to 6 inches thick<\/strong> due to its lower quench sensitivity. This makes 7050 the <strong>only choice<\/strong> for large, heavy\u2011section aerospace components such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Thick fuselage frames<\/strong> (3\u20136 inch sections)<\/li>\n\n\n\n<li><strong>Large bulkheads and wing spars<\/strong><\/li>\n\n\n\n<li><strong>Heavy\u2011section die forgings and hand forgings<\/strong><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><em>\u201c7050 alloy is particularly suited for heavy plate applications (3\u201d to 6\u201d thick) due to its lower quench sensitivity and retention of strength in thicker sections.\u201d<\/em> \u2013 Aircraft Materials<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\u2699\ufe0f Machinability and Workability<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 has <strong>fair machinability<\/strong> \u2013 similar to 7075. It can be machined using carbide\u2011tipped tools with sharp edges, adequate lubrication, and high cutting speeds. The alloy is <strong>not recommended for welding<\/strong> \u2013 conventional fusion welding significantly weakens the material, and mechanical fastening (riveting, bolting) or adhesive bonding is the preferred joining method.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83c\udfa8 Anodising and Finishing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">7050 can be <strong>anodised<\/strong> to improve surface hardness and corrosion resistance. However, the anodic film may not be as uniform as on 6xxx series alloys due to the high zinc content. Hardcoat anodising is commonly applied for wear\u2011resistant applications.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd25 Heat Treatment<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As a heat\u2011treatable alloy, 7050 can be significantly strengthened through:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Temper<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>O<\/strong><\/td><td>Annealed \u2013 maximum formability, minimum strength<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T7451<\/strong><\/td><td>Solution treated, stress\u2011relieved by stretching (1\u20133%), and overaged \u2013 <strong>best SCC resistance<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T7651<\/strong><\/td><td>Solution treated, stress\u2011relieved by stretching (1\u20133%), and overaged \u2013 <strong>highest strength<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T7452<\/strong><\/td><td>Similar to T7451 but for hand forgings (compression stress\u2011relieved)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>T7351<\/strong><\/td><td>Overaged for intermediate SCC resistance and strength<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Sources: Aircraft Materials \/ TW Metals<\/em><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Applications of Aluminium 7050<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 is a <strong>premium aerospace alloy<\/strong> whose unique combination of high strength, superior fracture toughness, outstanding SCC resistance, and thick\u2011section performance makes it indispensable for modern aircraft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2708\ufe0f Aerospace \u2013 <em>The #1 Application<\/em><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">7050 aluminium is the <strong>backbone of commercial and military aircraft structures<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fuselage frames<\/strong> \u2013 particularly in pressurised sections where crack propagation must be controlled<\/li>\n\n\n\n<li><strong>Bulkheads<\/strong> \u2013 large, thick\u2011section structural partitions<\/li>\n\n\n\n<li><strong>Wing skins<\/strong> \u2013 upper and lower surfaces requiring high strength and damage tolerance<\/li>\n\n\n\n<li><strong>Wing spars and ribs<\/strong> \u2013 load\u2011bearing wing structures<\/li>\n\n\n\n<li><strong>Landing gear components<\/strong> \u2013 where high fatigue strength is essential<\/li>\n\n\n\n<li><strong>Die forgings and hand forgings<\/strong> \u2013 large, complex structural parts<\/li>\n\n\n\n<li><strong>Heavy plate (3\u20136 inches thick)<\/strong> \u2013 fuselage frames, bulkheads, and other thick sections<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Notable aircraft using 7050 aluminium:<\/strong><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Boeing 787 Dreamliner<\/strong> \u2013 extensive use of 7050 in fuselage and wing structures<\/li>\n\n\n\n<li><strong>COMAC C919<\/strong> \u2013 China\u2019s first domestically produced large passenger aircraft, which required years of research to master 7050 manufacturing technology<\/li>\n\n\n\n<li><strong>Airbus A380<\/strong> \u2013 wing components and structural parts<\/li>\n\n\n\n<li><strong>Military aircraft<\/strong> \u2013 including fighter jets and transport aircraft<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\ude80 Defence &amp; Ordnance<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Missile components<\/strong> \u2013 airframes and structural parts<\/li>\n\n\n\n<li><strong>Military vehicle armour<\/strong> \u2013 where lightweight strength is critical<\/li>\n\n\n\n<li><strong>Ordnance components<\/strong> \u2013 requiring consistent high\u2011strength performance<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83c\udfce\ufe0f High\u2011Performance Automotive &amp; Motorsport<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Racing car chassis components<\/strong> \u2013 where strength\u2011to\u2011weight ratio is paramount<\/li>\n\n\n\n<li><strong>Suspension components<\/strong> \u2013 high\u2011stress, fatigue\u2011resistant parts<\/li>\n\n\n\n<li><strong>Additive manufacturing<\/strong> \u2013 7050 powder is used for selective laser melting (SLM) of aerospace brackets and high\u2011wear coating layers in motorsport applications<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd27 General Engineering (Limited)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High\u2011stress tooling and fixtures<\/strong> \u2013 requiring exceptional strength<\/li>\n\n\n\n<li><strong>Precision machinery components<\/strong> \u2013 where fatigue resistance is critical<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Fabrication &amp; Workability \u2013 Quick Guide<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Aspect<\/th><th>Recommendation<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Forming<\/strong><\/td><td>Use O (annealed) temper for forming; T7x tempers have limited formability<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Machining<\/strong><\/td><td>Fair \u2013 use carbide tools, sharp edges, adequate lubrication, high cutting speeds<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Welding<\/strong><\/td><td><strong>Not recommended<\/strong> \u2013 use riveting, bolting, or adhesive bonding instead<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Heat treatment<\/strong><\/td><td>Solution treat at 465\u2013480\u00b0C, water quench, then age (T7451 or T7651)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Anodising<\/strong><\/td><td>Possible \u2013 hardcoat recommended; may not be as uniform as 6xxx series<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Cold working<\/strong><\/td><td>Limited \u2013 alloy is typically used in heat\u2011treated condition<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why Choose Aluminium 7050?<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High strength<\/strong> \u2013 comparable to 7075, with ultimate tensile strength up to 531 MPa<\/li>\n\n\n\n<li><strong>Superior fracture toughness<\/strong> \u2013 significantly better than 7075 for damage\u2011tolerant designs<\/li>\n\n\n\n<li><strong>Outstanding stress\u2011corrosion cracking resistance<\/strong> \u2013 T7451 temper offers the best SCC resistance in the 7000 series<\/li>\n\n\n\n<li><strong>Excellent exfoliation corrosion resistance<\/strong> \u2013 T7451 temper offers excellent protection<\/li>\n\n\n\n<li><strong>Exceptional thick\u2011section performance<\/strong> \u2013 maintains properties in sections up to 6 inches thick<\/li>\n\n\n\n<li><strong>Excellent fatigue strength<\/strong> \u2013 ideal for cyclic loading applications<\/li>\n\n\n\n<li><strong>Good hardenability<\/strong> \u2013 suitable for producing thick die forgings and hand forgings<\/li>\n\n\n\n<li><strong>Heat treatable<\/strong> \u2013 properties can be tailored through thermal processing<\/li>\n\n\n\n<li><strong>High strength\u2011to\u2011weight ratio<\/strong> \u2013 density just 2.6\u20132.8 g\/cm\u00b3<\/li>\n\n\n\n<li><strong>Fully recyclable<\/strong> \u2013 sustainable for aerospace applications<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c Limitations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Not recommended for welding<\/strong> \u2013 conventional fusion welding significantly weakens the material<\/li>\n\n\n\n<li><strong>Fair machinability only<\/strong> \u2013 not as machinable as 6061 or 2011<\/li>\n\n\n\n<li><strong>Higher cost than 7075<\/strong> \u2013 premium alloy for specialised aerospace applications<\/li>\n\n\n\n<li><strong>Difficult to cast<\/strong> \u2013 described as the \u201cindustry\u2019s most difficult aluminium alloy to cast\u201d<\/li>\n\n\n\n<li><strong>Not suitable for thin sections<\/strong> \u2013 7075 may be more cost\u2011effective for thin\u2011gauge applications<\/li>\n\n\n\n<li><strong>Anodising less uniform<\/strong> \u2013 high zinc content can affect anodic film consistency<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminium 7050 (Aluminum 7050) is the <strong>third\u2011generation aerospace alloy<\/strong> that solved the thick\u2011section problem of the 7000 series. While 7075 revolutionised high\u2011strength aluminium applications, 7050 took the next step \u2013 delivering <strong>comparable strength with superior fracture toughness and outstanding stress\u2011corrosion cracking resistance<\/strong>, particularly in sections up to 6 inches thick.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From the fuselage frames and wing skins of the Boeing 787 and COMAC C919 to large die forgings and bulkheads, Aluminium 7050 provides the <strong>damage tolerance, corrosion resistance, and thick\u2011section performance<\/strong> that modern aerospace designs demand. It is not a general\u2011purpose alloy; it is a <strong>specialist<\/strong> \u2013 the choice for engineers who must balance high strength, fracture toughness, and long\u2011term corrosion reliability in thick\u2011section components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your application requires <strong>high strength in thick sections with outstanding corrosion resistance<\/strong>, Aluminium 7050 is the proven, trusted solution. Explore its properties relative to other alloys using the <strong><a href=\"https:\/\/aluminiummagazine.com\/webtools\/alloy-comparison-tool.html\">Aluminium Alloy Comparison Tool<\/a><\/strong>.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcda Related Articles<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Deepen your understanding of aluminium alloys with these curated guides:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/aluminiummagazine.com\/webtools\/alloy-comparison-tool.html\">Aluminium Alloy Comparison Tool<\/a><\/strong> \u2013 Compare 40+ aluminium alloys side by side to find the perfect material for your project<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/aluminium-7075.html\">Aluminium 7075: The Original High\u2011Strength Aerospace Alloy<\/a><\/strong> \u2013 The first\u2011generation 7000 series alloy that set the industry standard<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/aluminium-7475-aluminum-7475-alloy-properties-aerospace-guide.html\">Aluminium 7475: The Second\u2011Generation Aerospace Alloy with Superior Fracture Toughness<\/a><\/strong> \u2013 The toughness\u2011optimised 7000 series alloy for damage\u2011tolerant designs<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/aluminium-7068-aluminum-7068-strongest-alloy-properties-guide.html\">Aluminium 7068: The Strongest Aluminium Alloy<\/a><\/strong> \u2013 The ultimate strength alloy for landing gear and racing connecting rods<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/aluminiummagazine.com\/mag\/faqs\/why-is-aluminum-used-for-aircraft-bodies.html\">Why Is Aluminum Used for Aircraft Bodies?<\/a><\/strong> \u2013 Understanding the role of 7000 series alloys in aerospace<\/li>\n<\/ul>\n<\/p><script>document.addEventListener(\"DOMContentLoaded\",function(){\n        if(window.innerWidth <= 768){\n            if (\"immediate\" === \"delay\") {\n                setTimeout(function(){document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\")},0);\n            } else if (\"immediate\" === \"scroll\") {\n                window.addEventListener(\"scroll\",function(){\n                    let s=window.scrollY\/(document.body.scrollHeight-window.innerHeight);\n                    if(s>0.1){\n                        document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n                    }\n                });\n            } else {\n                document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n            }\n        } else {\n            document.querySelectorAll(\".pai-ad\").forEach(el=>el.remove());\n        }\n    });<\/script>","protected":false},"excerpt":{"rendered":"<p>Aluminium 7050 \u2013 also known as Aluminum 7050 \u2013 is a heat\u2011treatable aluminium\u2011zinc\u2011magnesium\u2011copper alloy that represents the third generation of high\u2011strength 7000 series alloys. Developed specifically for aerospace applications requiring thick sections, 7050 aluminum offers an exceptional combination of high strength, superior fracture toughness, and outstanding resistance to stress\u2011corrosion cracking. It is the material of &#8230; <a title=\"Aluminium 7050 (Aluminum 7050): The Ultimate Aerospace Alloy for Thick Sections\" class=\"read-more\" href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/aluminium-7050-aluminum-7050-alloy-properties-aerospace.html\" aria-label=\"Read more about Aluminium 7050 (Aluminum 7050): The Ultimate Aerospace Alloy for Thick Sections\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":17750,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[721],"tags":[4111,4109],"class_list":["post-17749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aluminium","tag-aluminium-alloys","tag-aluminum"],"_links":{"self":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/comments?post=17749"}],"version-history":[{"count":0,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17749\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media\/17750"}],"wp:attachment":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media?parent=17749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/categories?post=17749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/tags?post=17749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}