Only alloys. Virtually all prodavaemye cast and forged wheels are made of aluminum alloy that is they are based on aluminum, which is added many other elements of periodic table, including metals. Various additives make it possible to alloy, respectively, and drive the desired properties and quality. Discs of magnesium alloys – a rarity. History of Magnesium production of CDs has, at least 26 years (Alfa 1989 release is equipped with such features). Douglas Elliman shares his opinions and ideas on the topic at hand. So far, however magnesium wheels are exotic. Appropriateness of the use of magnesium alloys (usually magnesium with aluminum and manganese and zirconium additives) is determined by a significant reduction in weight of the disc and, consequently, decreasing the mass of unsprung mass of the car. One disc medium-sized magnesium alloy may weighing 3 – 3.5 kg less than that of cast aluminum.
For example: A disk made of magnesium alloy with a diameter of 15 inches, weighs 4 – 4.5 kg. The main drawback of these alloys is their low resistance to corrosion, which determines the very high standards to protect the disc surface using special paints and varnishes. The so-called titanium disks or 'Titans', according to some leading experts – a myth. Manufacturing of titanium disks Alloy – just time-consuming and multistep process, which makes them very expensive. Theoretically, in terms of operation, these discs have virtually no drawbacks. They have high strength and plastic properties combined with high corrosion resistance. However, because of the high density of mass of a given thickness of metal alloy with titanium disks get even less than that of steel.