{"id":3668,"date":"2021-04-12T12:56:16","date_gmt":"2021-04-12T12:56:16","guid":{"rendered":"https:\/\/www.publiteconline.it\/ael\/?p=3668"},"modified":"2025-09-29T13:30:15","modified_gmt":"2025-09-29T13:30:15","slug":"aluminium-wire-helps-the-energy-transition","status":"publish","type":"post","link":"https:\/\/www.publiteconline.it\/ael\/aluminium-wire-helps-the-energy-transition\/","title":{"rendered":"Aluminium Wire Helps the Energy Transition"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Continuous casting wire rod is a strategic material for electrical and mechanical aluminium applications. The experience of <a href=\"https:\/\/www.trimet.eu\/en\" target=\"_blank\" rel=\"noreferrer noopener\">Trimet Group<\/a>*<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Trimet Group is a German family-run company producing primary aluminium from electrolysis (540,000 tons\/year) and remelting (240,000 tons\/year) and transforming it into billets (90,000 tons\/year), slabs (115,000 tons\/year), alloy ingots (220,000 tons\/year) and wire rod (95,000 tons\/year).<br>Wire rod became part of the group\u2019s production with the acquisition from Rio Tinto of the two French plants in Saint-Jean-de-Maurienne and Castelsarrasin at the end of 2013. These plants are the production units of Trimet France, in whose capital the French state-controlled electricity operator EDF holds a 35% share (figure 1). This presence underscores how strategic it is, in an evolved market, to have wire rod available for electrical uses, and especially for high-voltage lines; above all in view of the necessary upgrades of distribution networks in anticipation of the increase in demand for electricity linked to the energy transition. The Saint-Jean-de-Maurienne plant has 180 electrolytic cells, 11 casting furnaces (each 20-60 t capacity, gas-heated) and three machines for casting and rolling wire rod in a continuous process. This sub-sector produces about 150,000 tonnes\/year of wire rod and employs 600 workers. Castelsarrasin, the other plant, is located in the south of France and specialises in the production of aluminium alloy wire rod for mechanical and welding purposes. It employs 35 workers and produces around 10,000 tonnes per year.<\/p>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"493\" src=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/FIG-2B_aluminium-electrical-wires-1-1.jpg\" alt=\"Figura 2:  Esempio di prodotti ottenuti da vergella\" class=\"wp-image-3669\" title=\"Figura 2:  Esempio di prodotti ottenuti da vergella\" srcset=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/FIG-2B_aluminium-electrical-wires-1-1.jpg 800w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/FIG-2B_aluminium-electrical-wires-1-1-600x370.jpg 600w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/FIG-2B_aluminium-electrical-wires-1-1-300x185.jpg 300w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/FIG-2B_aluminium-electrical-wires-1-1-768x473.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption>Figura 2: \nEsempio di prodotti ottenuti da vergella<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Continuous metal casting: the reasons behind its success<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Continuous casting is the process that leads directly from the liquid metal to the semi-finished product. In this way it is possible to produce bars, profiles, strips and tubes both in steel and in non-ferrous metals such as copper and aluminium. In particular with regard to aluminium, the number of alloys that can be used with this process is increasing. The absence of heating and remelting processes in the production cycle makes the various continuous casting processes very attractive. Cost reduction is intuitively a particular advantage and it will be an all the more significant source of savings if the material has a higher melting point and thus a higher casting temperature. It is therefore not surprising that around 90% of the steel (melting point = 1400 \u00b0C approx.) processed in the world includes this method in its production cycle. In the aluminium sector (melting point = approx. 700 \u00b0C), processes involving continuous casting are used in much smaller percentages. The products obtained from continuous casting can be divided into two distinct types. The first leads to CC production of thin, wide plates used as thin sheet stock, cooling fins, capsules and cans. The second is characterised by the continuous production of bars, which can be used without further processing or used, after subsequent rolling, to produce wire rod of different diameters. This casting scheme may also be applied to the casting of large bars, such as to enable the production of ingots of various weights by cutting the bar lengthwise.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"800\" height=\"303\" src=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figura-5_Composizione-chimica-LegheSaldatura-1.jpg\" alt=\"Figure 5: Chemical composition of the main aluminium welding alloys\" class=\"wp-image-3670\" title=\"Figure 5: Chemical composition of the main aluminium welding alloys\" srcset=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figura-5_Composizione-chimica-LegheSaldatura-1.jpg 800w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figura-5_Composizione-chimica-LegheSaldatura-1-600x227.jpg 600w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figura-5_Composizione-chimica-LegheSaldatura-1-300x114.jpg 300w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figura-5_Composizione-chimica-LegheSaldatura-1-768x291.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption>Figure 5: \nChemical composition of the main aluminium welding alloys \n<\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Metallurgical advantages of continuous casting<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Continuous casting does not only bring economic advantages by affecting the energy balance of the process. The method is also convenient to achieve a good level of quality in the production of semis. In particular, CC allows good control of cooling and, as a result, the microstructure of the products is uniform. Compared to mould casting, CC also reduces the amount of scrap generated. Besides, the properties of the products can be easily modified by changing the melting parameters. Since all operations can be automated and controlled, continuous casting offers numerous possibilities to flexibly and quickly adapt production to changing market needs and combine it with digitisation technologies.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"800\" height=\"468\" src=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-3_Trimet_Tensile-properties-UTS-1.jpg\" alt=\"Figure 3: Tensile properties (UTS) of Trimet\u2019s Redraw Rod (Continuously Cast and Rolled wire) in different alloys\" class=\"wp-image-3671\" title=\"Figure 3: Tensile properties (UTS) of Trimet\u2019s Redraw Rod (Continuously Cast and Rolled wire) in different alloys\" srcset=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-3_Trimet_Tensile-properties-UTS-1.jpg 800w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-3_Trimet_Tensile-properties-UTS-1-600x351.jpg 600w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-3_Trimet_Tensile-properties-UTS-1-300x176.jpg 300w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-3_Trimet_Tensile-properties-UTS-1-768x449.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption>Figure 3: \nTensile properties (UTS) of Trimet\u2019s Redraw Rod (Continuously Cast and Rolled wire) in different alloys\n<\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Bar production using continuous casting<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Briefly, the continuous casting production of bars and subsequent rolling to produce wire rod is carried out according to the following scheme. In the process of continuous bar casting, the liquid metal passes through the groove of a cooled wheel and solidifies into the shape of the groove in cross-section. Then the semi-finished product coming out of the wheel is continuously deformed by passing through a series of rolling cages which gradually shape the rough product until it is transformed into round wire of the desired diameter.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"114\" src=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-4_Properties-of-ENAW-8040-Trimet-1.jpg\" alt=\"Figure 4: Properties of ENAW 8040 alloy. Its main application is the construction of high voltage lines\" class=\"wp-image-3672\" title=\"Figure 4: Properties of ENAW 8040 alloy. Its main application is the construction of high voltage lines\" srcset=\"https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-4_Properties-of-ENAW-8040-Trimet-1.jpg 800w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-4_Properties-of-ENAW-8040-Trimet-1-600x86.jpg 600w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-4_Properties-of-ENAW-8040-Trimet-1-300x43.jpg 300w, https:\/\/www.publiteconline.it\/ael\/wp-content\/uploads\/2021\/04\/Figure-4_Properties-of-ENAW-8040-Trimet-1-768x109.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption>Figure 4: Properties of ENAW 8040 alloy. Its main application is the construction of high voltage lines<\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">From semi-finished to finished product<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The rolled products obtained by the process described are used to manufacture a large number of products in various sectors of electrical engineering and mechanics. Figure 2 shows some of the products derived from wire rod.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mechanical applications:<br>\u25cf Cables<br>\u25cf Power transmission and distribution lines<br>\u25cf Connections<br>\u25cf Flexible cables for batteries\/transformers<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical applications:<br>\u25cf Fastening systems<br>\u25cf Screws<br>\u25cf Chains, grids, nets<br>\u25cf Forged parts, moulds<br>\u25cf Welding wire<br>\u25cf Metallisation<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In general terms, the different applications are made possible by the use of various aluminium alloys with a wide range of technological properties.<br>The greatest diversification is between products for electrical engineering which will require semis with good electrical conductivity and applications in mechanics for which high tensile properties are usually required. Figure 3 shows the tensile properties of a large number of alloys used for wire rod. The ultimate tensile strength may be low (in the case of 1xxx alloys) or similar to that of a good carbon steel.<br>In other cases, as mentioned above, good electrical conductivity is sought, as in the case of the alloy ENAW 8040, whose chemical composition is shown in Figure 4. This alloy is used in high voltage lines due to its good temperature resistance. Al-Si and Al-Mg alloys are used for the production of filler material in welding. Differences in composition allow a wider choice to improve the quality of welded joints, as illustrated in Figure 5.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Continuous casting wire rod is a strategic material for electrical and mechanical aluminium applications. The experience of Trimet Group* The Trimet Group is a German family-run company producing primary aluminium from electrolysis (540,000 tons\/year) and remelting (240,000 tons\/year) and transforming it into billets (90,000 tons\/year), slabs (115,000 tons\/year), alloy ingots (220,000 tons\/year) and wire rod &hellip;<\/p>\n","protected":false},"author":4,"featured_media":3662,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"give_campaign_id":0,"footnotes":""},"categories":[2329],"tags":[1467,851,1463,1465,1315],"class_list":["post-3668","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archivio","tag-aluminium-cables","tag-aluminium-semis","tag-aluminium-wire-rod","tag-continuous-casting","tag-trimet-group"],"openstation_lock":null,"openstation_contributors":[],"openstation_attached_media":[3662,3669,3670,3671,3672],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminium Wire Helps the Energy Transition - A&amp;L Alluminio e Leghe<\/title>\n<meta name=\"description\" content=\"La vergella da colata continua \u00e8 un materiale strategico per le applicazioni elettriche e meccaniche dell\u2019alluminio. 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