{"id":26471,"date":"2025-11-27T15:21:53","date_gmt":"2025-11-27T07:21:53","guid":{"rendered":"https:\/\/sinoextrud.com\/?p=26471"},"modified":"2025-11-27T15:21:53","modified_gmt":"2025-11-27T07:21:53","slug":"what-raw-materials-can-be-used-for-aluminum-extrusion","status":"publish","type":"post","link":"https:\/\/sinoextrud.com\/nl\/what-raw-materials-can-be-used-for-aluminum-extrusion\/","title":{"rendered":"what raw materials can be used for aluminum extrusion?"},"content":{"rendered":"

\"Aluminium
Aluminium extrusie 6101B geleidende rail aluminium profiel<\/figcaption><\/figure>\n<\/p>\n

Aluminum extrusion starts long before a billet meets the press. The raw material \u2014 the aluminum alloy, its purity, and even whether it\u2019s recycled \u2014 determines everything from how the metal flows to how strong and clean the final product is.<\/p>\n

Aluminum extrusion uses billets made from specific aluminum alloys, often 6000-series like 6063 or 6061. The quality, composition, and condition of these raw materials directly impact extrusion speed, surface finish, mechanical strength, and long-term reliability.<\/strong><\/p>\n

If the wrong alloy is used, or if billet quality is low, the final result may be flawed, inconsistent, or even unusable. Let\u2019s explore which materials matter most and why.<\/p>\n

\n

Which alloys suit extrusion best?<\/h2>\n

Aluminum comes in many grades. But only some are easy to extrude and produce high-quality results. Choosing the wrong alloy makes profiles harder to shape or weak after forming.<\/p>\n

6000-series alloys such as 6063 and 6061 are best suited for extrusion due to their balance of flowability, surface finish, and mechanical strength.<\/strong><\/p>\n

\"Zonneframes
Zonneframes Aluminium profielen<\/figcaption><\/figure>\n<\/p>\n

Not all aluminum behaves the same under heat and pressure. The most common extrusion alloys are from the 6000-series, because they combine magnesium and silicon. This combination gives good strength and allows smooth flow through dies. Let\u2019s compare two of the most popular alloys:<\/p>\n

    \n
  • \n

    6063 legering<\/strong>
    \nThis is the workhorse of aluminum extrusion. It has moderate strength, excellent corrosion resistance, and superb surface finish. It extrudes easily, making it ideal for architectural applications where appearance matters. It responds well to anodizing and is commonly used for window frames, door rails, and decorative trims.<\/p>\n<\/li>\n

  • \n

    6061 legering<\/strong>
    \nThis alloy has higher strength than 6063 and better mechanical properties. It\u2019s commonly used for structural applications, truck frames, and aerospace components. However, it doesn\u2019t flow as easily as 6063, and the surface finish may not be as smooth. It\u2019s more prone to tearing if the die or process is not properly optimized.<\/p>\n<\/li>\n<\/ul>\n

    Other alloys used in extrusion include:<\/p>\n

      \n
    • 6082<\/strong> \u2013 Offers high strength, used in structural engineering.<\/li>\n
    • 6106<\/strong> \u2013 Known for high corrosion resistance.<\/li>\n
    • 6463<\/strong> \u2013 Used for bright-finish architectural profiles.<\/li>\n<\/ul>\n

      Common extrusion alloys and applications<\/h3>\n\n\n\n\n\n\n\n\n
      Alloy<\/th>\nUitdrijfbaarheid<\/th>\nSterkte<\/th>\nAfwerking oppervlak<\/th>\nTypisch gebruik<\/th>\n<\/tr>\n<\/thead>\n
      6063<\/td>\nUitstekend<\/td>\nMedium<\/td>\nZeer goed<\/td>\nDoors, windows, furniture<\/td>\n<\/tr>\n
      6061<\/td>\nGoed<\/td>\nHoog<\/td>\nGoed<\/td>\nMachinery, transport, load frames<\/td>\n<\/tr>\n
      6082<\/td>\nMatig<\/td>\nHoog<\/td>\nMatig<\/td>\nStructural beams<\/td>\n<\/tr>\n
      6463<\/td>\nUitstekend<\/td>\nMedium<\/td>\nBright finish<\/td>\nAutomotive trims, polished parts<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Choosing the correct alloy depends on the product\u2019s end use. If the part must look perfect, 6063 is better. If strength is key, 6061 or 6082 is preferred. The choice affects everything from extrusion speed to finishing cost.<\/p>\n

      <\/svg> 6063 alloy is ideal for applications where appearance and anodizing quality are important.<\/b>Echt<\/span><\/p>

      Its smooth surface, good corrosion resistance and flow make it the best for visible, decorative profiles.<\/p><\/div>\n

      <\/svg> All aluminum alloys behave the same during extrusion.<\/b>Vals<\/span><\/p>

      Different alloy compositions change flow, strength, finish, and die wear. Alloy choice affects extrusion quality.<\/p><\/div>\n

      \n

      Why billet purity influences quality?<\/h2>\n

      Even the best alloy fails if the billet has poor purity. Impurities or poor casting lead to cracking, uneven extrusion, or weak points in the final part.<\/p>\n

      Billet purity affects grain structure, surface finish, and internal strength. Cleaner billets produce better extrusions with fewer defects and more consistent properties.<\/strong><\/p>\n

      \"Aluminium
      Aluminium extrusie profiel rolluik<\/figcaption><\/figure>\n<\/p>\n

      A billet is the raw log of aluminum that is heated and forced through the die. To make good extrusions, the billet must have a uniform chemical composition and be free from gas pockets, dirt, or oxidation.<\/p>\n

      Purity is controlled in several ways:<\/p>\n

        \n
      • Primary billets<\/strong> are made from virgin aluminum ingots. These are the cleanest and most uniform. They are used for high-quality profiles, precision parts, and critical applications.<\/li>\n
      • Secondary billets<\/strong> are made from remelted aluminum scrap. Quality depends on how clean and well-sorted the scrap is before melting.<\/li>\n<\/ul>\n

        Inside the billet, the grain structure<\/strong> matters. A good billet has fine, uniform grains with no cracks or segregation. This structure ensures the aluminum flows evenly through the die, producing smooth and consistent profiles.<\/p>\n

        Poor billet purity causes:<\/p>\n

          \n
        • Flow defects<\/strong> \u2013 metal may resist entering narrow die sections.<\/li>\n
        • Surface flaws<\/strong> \u2013 dirt or inclusions create rough textures.<\/li>\n
        • Weak spots<\/strong> \u2013 improper bonding during extrusion may lead to failure under load.<\/li>\n
        • Die damage<\/strong> \u2013 hard impurities can wear or crack dies.<\/li>\n<\/ul>\n

          Billets also go through homogenization<\/strong>, a heat treatment that evens out the internal structure and prepares the billet for smooth extrusion. Skipping this step or using poor billets increases failure risk.<\/p>\n

          Primary vs. secondary billet quality comparison<\/h3>\n\n\n\n\n\n\n\n\n
          Functie<\/th>\nPrimary Billet<\/th>\nSecondary Billet (Recycled)<\/th>\n<\/tr>\n<\/thead>\n
          Zuiverheid<\/td>\nZeer hoog<\/td>\nVariabele<\/td>\n<\/tr>\n
          Afwerking oppervlak<\/td>\nClean, bright<\/td>\nMay show oxidation or pits<\/td>\n<\/tr>\n
          Internal structure<\/td>\nUniform grains<\/td>\nRisk of segregation or voids<\/td>\n<\/tr>\n
          Gebruikscases<\/td>\nHigh-performance parts<\/td>\nGeneral industrial profiles<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          <\/svg> Billet purity directly affects extrusion surface finish and flow consistency.<\/b>Echt<\/span><\/p>

          Cleaner billets flow more evenly and leave fewer surface defects or weak areas.<\/p><\/div>\n

          <\/svg> Impurities in the billet do not affect the final strength of the extruded part.<\/b>Vals<\/span><\/p>

          Impurities interrupt metal bonding during flow, reducing structural performance.<\/p><\/div>\n

          \n

          How recycled aluminum affects properties?<\/h2>\n

          Recycled aluminum offers a green solution, but only if the recycling process is controlled. Bad scrap leads to worse extrusion, while good recycled billets can match virgin ones.<\/p>\n

          Recycled aluminum, when properly sorted and melted, can match virgin aluminum for extrusion. But poor scrap management leads to impurities, poor flow, and weak parts.<\/strong><\/p>\n

          \"Aluminium
          Aluminium extrusie 7003 7005 7020 hoge hardheid geanodiseerd aluminium profiel<\/figcaption><\/figure>\n<\/p>\n

          Aluminum is highly recyclable. In fact, many extrusion plants use scrap material to produce billets. This reduces energy use and material costs. But using scrap means more care during billet production.<\/p>\n

          Scrap aluminum comes from two sources:<\/p>\n

            \n
          1. Post-industrial scrap<\/strong> \u2013 leftover cuts from factories. Often clean and sorted by alloy.<\/li>\n
          2. Post-consumer scrap<\/strong> \u2013 old windows, cans, mixed parts. Harder to sort and clean.<\/li>\n<\/ol>\n

            When recycled scrap is melted, it must be:<\/p>\n

              \n
            • Decontaminated<\/strong> \u2013 to remove paint, oils, and coatings.<\/li>\n
            • Sorted by alloy<\/strong> \u2013 to prevent unwanted element combinations.<\/li>\n
            • Refined<\/strong> \u2013 using fluxing agents to remove impurities.<\/li>\n<\/ul>\n

              Good foundries can turn scrap into billets with 95\u201398% purity and stable alloy content. These billets extrude well, especially for non-critical parts.<\/p>\n

              Problems arise when:<\/p>\n

                \n
              • Different scrap alloys are mixed<\/li>\n
              • Contaminants are not removed<\/li>\n
              • Melt is not homogenized properly<\/li>\n<\/ul>\n

                This causes porosity, variable hardness, inconsistent strength, and extrusion cracking.<\/p>\n

                Sustainable companies often aim for recycled content<\/strong> above 50% in general-purpose profiles. For aerospace or high-spec parts, virgin or certified billets are preferred.<\/p>\n

                <\/svg> High-quality recycled aluminum can produce extrusions equal in strength to those from virgin billets.<\/b>Echt<\/span><\/p>

                If scrap is sorted, cleaned, and melted properly, billet quality can be very high.<\/p><\/div>\n

                <\/svg> Using recycled aluminum always lowers the extrusion cost without trade-offs.<\/b>Vals<\/span><\/p>

                Low-quality scrap may increase defect rates, slow production, or shorten die life.<\/p><\/div>\n

                \n

                Can additives modify alloy behavior?<\/h2>\n

                Sometimes standard alloys aren\u2019t enough. Additives or extra alloying elements can improve performance, but also make extrusion more complex.<\/p>\n

                Additives like copper, zinc, or chromium can enhance aluminum alloy properties such as strength, corrosion resistance, or thermal stability \u2014 but they may reduce flow and require precise control.<\/strong><\/p>\n

                \"Dubbele
                Dubbele hoek aluminium extrusie<\/figcaption><\/figure>\n<\/p>\n

                Aluminum alloys are made by adding other elements. In 6000-series, magnesium and silicon are essential. But other elements change how the aluminum performs:<\/p>\n

                  \n
                • Koper<\/strong> \u2013 improves strength and hardness, used in aerospace.<\/li>\n
                • Zink<\/strong> \u2013 added in 7000-series alloys for high-performance structural uses.<\/li>\n
                • Chromium \/ manganese<\/strong> \u2013 increase corrosion resistance.<\/li>\n
                • Iron \/ titanium<\/strong> \u2013 sometimes added for grain control or wear resistance.<\/li>\n<\/ul>\n

                  These additives help meet demanding applications \u2014 for example, truck chassis, heat sinks, or military-grade extrusions. But there’s a trade-off:<\/p>\n

                    \n
                  • Harder to extrude<\/strong> \u2013 metal doesn\u2019t flow as easily.<\/li>\n
                  • More die wear<\/strong> \u2013 abrasive elements cause faster tool degradation.<\/li>\n
                  • Tighter process limits<\/strong> \u2013 requires narrow temperature and pressure ranges.<\/li>\n
                  • Lower surface quality<\/strong> \u2013 rougher finishes unless optimized.<\/li>\n<\/ul>\n

                    Die design also matters more with modified alloys. Small changes in die angle or bearing thickness may solve or worsen flow problems. Operators must adjust speed, billet temperature, and container pressure more carefully.<\/p>\n

                    Still, these alloys are valuable. They allow parts to be stronger, lighter, and more corrosion-resistant \u2014 if produced correctly.<\/p>\n

                    <\/svg> Alloy additives can raise strength, but make extrusion more sensitive to process settings.<\/b>Echt<\/span><\/p>

                    Extra elements change how aluminum behaves under pressure and heat, requiring better process control.<\/p><\/div>\n

                    <\/svg> Adding more elements always improves extrusion flow and surface finish.<\/b>Vals<\/span><\/p>

                    Many additives reduce flowability and may cause rougher surfaces or more wear on tooling.<\/p><\/div>\n

                    \n

                    Conclusie<\/h2>\n

                    Aluminum extrusion starts with the right raw material. The alloy type, billet purity, and presence of recycled content all play a role in final product quality. Alloys like 6063 and 6061 provide a good balance between workability and strength. Clean billets ensure smooth flow and reliable properties. Recycled aluminum helps cut costs and emissions, but only if refined carefully. And when advanced performance is needed, additives allow fine-tuned properties \u2014 but make the process harder. Choose wisely, and your extrusions will be strong, consistent, and ready to perform.<\/p>","protected":false},"excerpt":{"rendered":"

                    Aluminum Extrusion 6101B Conductive Rail Aluminum Profile Aluminum extrusion starts long before a billet meets the press. The raw material \u2014 the aluminum alloy, its purity, and even whether it\u2019s recycled \u2014 determines everything from how the metal flows to how strong and clean the final product is. Aluminum extrusion uses billets made from specific […]<\/p>\n","protected":false},"author":6,"featured_media":5835,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-26471","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-custom-mold"],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/posts\/26471","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/comments?post=26471"}],"version-history":[{"count":0,"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/posts\/26471\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/media\/5835"}],"wp:attachment":[{"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/media?parent=26471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/categories?post=26471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinoextrud.com\/nl\/wp-json\/wp\/v2\/tags?post=26471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}