Al(Atomic Number : 13)

1. Introduce – A lightweight metal that is fairly soft among metals and has about one-third the specific gravity of iron – Low temperature strength metal that can be used at temperatures as low as -200℃ – A strong nitrogen oxide with a strong affinity for oxygen and nitrogen – A very chemically reactive metal that resists corrosion from air and water due to the thin oxide film that naturally forms on its surface – Al alloy element influence : the role of deoxidation and grain refinement, improve the impact toughness of steel, Reduce cold brittleness and aging tend...