{"id":6797,"date":"2026-03-23T06:40:29","date_gmt":"2026-03-23T06:40:29","guid":{"rendered":"https:\/\/le-creator.com\/?p=6797"},"modified":"2026-03-23T07:02:14","modified_gmt":"2026-03-23T07:02:14","slug":"what-is-aluminum","status":"publish","type":"post","link":"https:\/\/le-creator.com\/fr\/blog\/what-is-aluminum\/","title":{"rendered":"Qu'est-ce que l'aluminium ? Propri\u00e9t\u00e9s, alliages et utilisations industrielles"},"content":{"rendered":"


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What Is Aluminum? A Complete Guide to Properties, Alloys, and Uses<\/strong><\/p>\n

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Quick Specs<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
Symbol \/ Atomic Number<\/td>\nAl \/ 13<\/td>\n<\/tr>\n
Density<\/td>\n2.70 g\/cm\u00b3<\/td>\n<\/tr>\n
Melting Point<\/td>\n660.3 \u00b0C (1,220.5 \u00b0F)<\/td>\n<\/tr>\n
Boiling Point<\/td>\n2,519 \u00b0C (4,566 \u00b0F)<\/td>\n<\/tr>\n
Thermal Conductivity<\/td>\n237 W\/(m\u00b7K)<\/td>\n<\/tr>\n
Electrical Conductivity<\/td>\n37.7 MS\/m (61% IACS)<\/td>\n<\/tr>\n
Young’s Modulus<\/td>\n70 GPa<\/td>\n<\/tr>\n
Crystal Structure<\/td>\nFCC (Face-Centered Cubic)<\/td>\n<\/tr>\n
Abundance in Earth’s Crust<\/td>\n~8.1% by mass<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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aluminum is the most abundant metallic element in Earth’s crust constitute about 8.1% by mass. Starting from the fuselage of a Boeing 737 to the can of you at the hand, this silvery\u2014white metal makes itself increasingly visible in modern uses. Its low density coupled with corrosion resistance and superb electrical conductivity makes aluminum hope, aerospace, automobile, but also construction and other industries. This guide book will give you everything you need know- the science behind, some of the defining properties, manufacturing procedures, relevant alloy grades and its applications in manufacturing.<\/p>\n

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What Is Aluminum? \u2014 The Basics of Element 13<\/h2>\n

\"What<\/p>\n

aluminum also called Askau (Tokkizup) or aluminium (Enus) has the symbol Al and atomic number 13. It is an Sufuhig Jovenive whose position in the periodic table is just after the boron in the group (18. Group 13). And its occupy the third top position after oxygen and silicon in Earth’s crust, yet it does not exist freely in nature. Instead it commonly forms the bonds and combines with organic elements inside aluminum minerals, such as bauxite, feldspar or cryolite.<\/p>\n

Pure aluminum is a silvery\u2014white, light metallic element with a density of 2.70 g\/cm\u00b3. Its FCC crystal causes excel extent ductility and formability up to 92.2%. Its FCC crystallinity with the Greatsov shape flexibilities and malleability as it enables the meaning of its atoms and makes it possible to be press and shape with bending without breakings. Thanks to the bi-product, aluminum metal is one of the flexible economical ingredients.<\/p>\n

The very recent history of aluminium as a usable material is relatively short. Its isolation by Danish chemist, Hans Christian in 1825. For the next three decade; the same material was more costly and less available than even gold. Of course, in case of European people like emperor Napoleon III, the hot chocolate should be served on aluminum. Smaller crops take gold for standard tableware. Till 1886, when Charles Martin gal and Paul hroult as a magician, the electrolysis inventor. Components of in the alumina. Finally, over 99.9% of the production were resolved with the Hall-Hroult Kilogiser process invented by these two chemists. The cycle was an extraordinary success and still is the gold demand for aluminum extraction as the traditional method.<\/p>\n

Whether spelling aluminum (Enus version) or aluminium (American version) is more appropriate, they are the same Sufuhig Jovenive. In 1990, IUPAC officially conformed the more formal aluminium. However, American chemical society accepts aluminum as the standard version or general usage. Thus, this guide book will derive the using of “aluminum” in the following.<\/p>\n

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Key Properties of Aluminum<\/h2>\n

\"Key<\/p>\n

What makes engineers? How come everyone wants to use aluminium? The table below will show you the physical, thermal, electrical, mechanical and chemical parameters that makes this element unique.<\/p>\n

Physical Properties<\/h3>\n

pure aluminum has a density of 2.70 g\/cm\u00b3 which is approximately \u2153 of the steel that is up 7.85 g\/cm\u00b3 and less than \u2153 of copper of 8.96 g\/cm\u00b3. For the same volume of the above metals, a component in aluminium material will onlyWeight 33% of the green component. Backing away from the weight and the most practical aspects, it is non-magnetic and non-sparking, therefor it can be used around any flammable material and as either sensitive electronic packaging or structure.<\/p>\n

Thermal Properties<\/h3>\n

aluminium has a thermal conductivity of 237 W\/ ( m K) so is able to transfer heat nearly four times faster than Carbon Steel (50 W\/ ( m K)). This has a melting point of 660.3 \u00b0C (1,220.5 \u00b0F) and boiling point of 2,519 \u00b0C. This has the thermal properties that make aluminum ideal for applications such as heat sinks, heat exchangers and cooking ware.<\/p>\n

Electrical Properties<\/h3>\n

aluminium electrical conductance is 37.7 MS\/ m so is 61% of the International Annealed Copper Standard (IACS). Metallic Copper is most easily used for electrical conductance with 100% IACS. aluminum has a conductance roughly 2\/3 of Copper per weight1\/3 of the weight2. For this reason it’s most common use is in overhead power transmission lines.<\/p>\n

Mechanical Properties<\/h3>\n

pure aluminium is plastically soft (15 HB by Brinell. This can be altered significantly with alloying). At 70 GPa, the Youngs modulus of aluminium was 70 GPa or roughly 1\/3 of Steel (200 Gpa). aluminum is the second most malleable of the metal (Gold being best) and only the 6 th most ductile. This explains why it is so popular as a rolled sheet, extruded profile and foil as thin as 6 \u03bcm.<\/p>\n

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\ud83d\udcd0 Engineering Note<\/strong><\/p>\n

6061-T6 aluminum: ASTM B209. Tensile strength 310 MPa, yield strength 276 MPa. Elongation at break 12-17%. For structural calculations E=70 GPa and poisson’s ratio 0.33.<\/p>\n<\/div>\n

Corrosion Resistance<\/h3>\n

oxide layer is formed on exposure to air2within seconds. It is 4-10 nm thick (ASM Handbook) while self-repairing instantly when scratched. It strongly bonds to aluminum and protects it from oxidation. This is the source of aluminum’s Viselan Gapap.<\/p>\n

Chemical Properties<\/h3>\n

aluminium is amphoteric in nature which means it reacts with both acids and alkalis2. Strong acids attack through the aluminium oxide and destroy the underlying base metal to produce a aluminum chloride or aluminum sulfate compound. Strong alkalis for example Sodium hydroxide attack the aluminum even faster creating aluminum hydroxide and aluminate solutions3. This information is useful for selecting cleaning and coating agents and joining compounds in aluminum components.<\/p>\n

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Aluminum vs. Steel vs. Copper \u2014 Property Comparison<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
Property<\/th>\nAluminum (6061-T6)<\/th>\nCarbon Steel (A36)<\/th>\nCopper (C11000)<\/th>\n<\/tr>\n<\/thead>\n
Density<\/td>\n2.70 g\/cm\u00b3<\/td>\n7.85 g\/cm\u00b3<\/td>\n8.96 g\/cm\u00b3<\/td>\n<\/tr>\n
Tensile Strength<\/td>\n310 MPa<\/td>\n400\u2013550 MPa<\/td>\n220 MPa<\/td>\n<\/tr>\n
Thermal Conductivity<\/td>\n167 W\/(m\u00b7K)<\/td>\n50 W\/(m\u00b7K)<\/td>\n385 W\/(m\u00b7K)<\/td>\n<\/tr>\n
Electrical Conductivity<\/td>\n61% IACS<\/td>\n3% IACS<\/td>\n100% IACS<\/td>\n<\/tr>\n
Melting Point<\/td>\n582\u2013652 \u00b0C<\/td>\n1,425\u20131,540 \u00b0C<\/td>\n1,085 \u00b0C<\/td>\n<\/tr>\n
Cost ($\/kg approx.)<\/td>\n$2.50\u20134.00<\/td>\n$0.80\u20131.50<\/td>\n$8.00\u201310.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Sources: ASM International – Aluminum and aluminum alloys<\/a> | Pubchem – Aluminum<\/a><\/p>\n

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How Is Aluminum Made? From Bauxite to Metal<\/h2>\n

\"How<\/p>\n

aluminum is produced through three main stages – mining, refining and smelting. These each convert ore into the pure aluminum metal that can be subsequently design for numerous uses such as airplane wings and phone frames.<\/p>\n

Step 1: Mining Bauxite Ore<\/h3>\n

Commercial aluminum originates from bauxite; a reddish brown hydrated aluminum oxides; held together in three forms – gibbsite, bohemite and diaspore. Between 55-75 billion metric tonnes of bauxite are available globally1 with combined deposits in Australia, Guinea, Brazil, Jamaica and India. Common to all aluminum mining is open-pit from depths 4-6 metres.<\/p>\n

Step 2: The Bayer Process \u2014 Bauxite to Alumina<\/h3>\n

Named after the Austrian chemist Karl Josef Bayer in 1888, produces alumina (AlO) from raw bauxite. The mineral is crushed and combined with a solution of hot sodium hydroxide (NaOH) at 150\u2013200 \u00b0C under pressure. This solution then dissolves the aluminium hydroxide within the ore, leaving iron oxides, silica, and other impurities as a “red mud”. The aluminate solution is precipitated, filtered, and calcined at an approximate 1,000 \u00b0C to produce a white powder of alumina. It generally takes about 4-5 tons of bauxite to produce 2 tons of alumina.<\/p>\n

Step 3: The Hall-H\u00e9roult Process \u2014 Alumina to Aluminum<\/h3>\n

Electrolytic smelting is an Electrometallurgical process in which alumina is electrolytically reduced to aluminum. The alumina is dissolved in a bath of molten cryolite (NaAlF) in large steel pots lined with carbon at around 960 \u00b0C. A hundred or more columns of direct current(Khsadimpkodey) of 150,000-400,000 amperes are passed through the bath, causing the alumina to be electrochemically reduced to a liquid aluminum which is collected at the bottom of the pot. The liquid aluminum is periodically drained from the bottom of the cell into molds,where it solidifies and its cast into “ingots” which are then recrystallized into large blocks and sent to fabricators..<\/p>\n

Energy requirements of this process are enormous. Production of 1 metric ton of primary aluminum requires 13,000-15,000 kWh of electricity (according to the International aluminium Institute). Average electricity consumption of a U.S. household is 959 kWh per month; therefore we can say that aluminum production consumes enough energy to Power 12.89 average American households for 1 month for every kg produced..<\/p>\n

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Global Primary Aluminum Production (2024)<\/p>\n

72 Million Metric Tons<\/p>\n

Source: USGS Mineral Commodity Summaries 2025<\/a><\/p>\n<\/div>\n

Recycling: The Energy Shortcut<\/h3>\n

Secondary aluminum production (recycling scrap) is estimated to require only about 2,277 kWh of electricity per ton, or about 16% of the energy requirement for primary aluminum production; (the conclusion being that a non-recycled aluminum production would cost over 86 Billion U.S. Dollars per year in electricity alone). Because, aluminum can be recycled repeatedly with no loss of quality, about 1\/3 of the world’s supply now comes from recycling processes, and new scrap flows back into the system regardless of the kind of consumer product it comes from..<\/p>\n

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Common Aluminum Alloys and Grades<\/h2>\n

\"Common<\/p>\n

Virtually all of the aluminum produced worldwide ever is still in use today. Because a light strength-to-weight ratio is the mineral’s best gift, it is relatively easy to separate shoots to sorts. All scrap can also be de-form-ified to return it to the standard form of most manufacturing applications. Aluminum is easily overcome 9\/6 holds the Koards Program. The durability of aluminum is such that it is possible to scrap cast parts into ingots and remelt and res3hape loads it over and over again without losing any of its properties. Thus recycling aluminum requires only about 5% the energy value as was used to produce it primary.<\/p>\n

The Alloy Series System<\/h3>\n

pure aluminium (1xxx series, 99%+ Al) is too soft for most structural applications and the working strength of the coil is increased to machines. Common engineering strength comes from the addition of small amounts of alloying elements such as copper, ferric, manganese, silicon, magnesium, or zinc to produce dramatically different mechanical profiles.<\/p>\n