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2. Aluminium - Wikipedia

   en.wikipedia.org/wiki/Aluminium

   Aluminium (or aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.

3. Aluminium alloy - Wikipedia

   en.wikipedia.org/wiki/Aluminium_alloy

   Aluminium alloy. An aluminium alloy (UK / IUPAC) or aluminum alloy (NA; see spelling differences) is an alloy in which aluminium (Al) is the predominant metal. The typical alloying elements are copper, magnesium, manganese, silicon, tin, nickel and zinc. There are two principal classifications, namely casting alloys and wrought alloys, both of ...

4. Isotopes of aluminium - Wikipedia

   en.wikipedia.org/wiki/Isotopes_of_aluminium

   edit. Aluminium or aluminum (13 Al) has 23 known isotopes from 21 Al to 43 Al and 4 known isomers. Only 27 Al (stable isotope) and 26 Al (radioactive isotope, t 1/2 = 7.2×105y) occur naturally, however 27 Al comprises nearly all natural aluminium. Other than 26 Al, all radioisotopes have half-lives under 7 minutes, most under a second.

5. Metal furniture - Wikipedia

   en.wikipedia.org/wiki/Metal_furniture

   Stainless steel table with glass plate top. The chairs are polypropylene composite plastic with stainless steel legs. Metal furniture is furniture made with metal parts: iron, carbon steel, aluminium, brass and stainless steel. Iron and steel products are extensively used in many application, ranging from office furnishings to outdoor settings.

6. Aluminum industry in the United States - Wikipedia

   en.wikipedia.org/wiki/Aluminum_industry_in_the...

   Data from USGS. The aluminum industry in the United States in 2023 produced 860 thousand metric tons of aluminum from refined metal ore (primary production), at six smelters. In addition, US industry recycled 3.4 million tons of aluminum (so-called secondary production aluminum). [1] Total annual imports of metal and alloy for use in secondary ...

7. Heavy metal (elements) - Wikipedia

   en.wikipedia.org/wiki/Heavy_metal_(elements)

   This table shows the number of heavy metal criteria met by each metal, out of the ten criteria listed in this section i.e. two based on density, three on atomic weight, two on atomic number, and three on chemical behaviour. [n 1] It illustrates the lack of agreement surrounding the concept, with the possible exception of mercury, lead and bismuth.