Depending on the manner in which and from which the wheels are made to differ their technical characteristics, appearance and price. Punching steel wheels Steel is the cheapest construction material. Therefore, steel wheels until the mid-twentieth century monopoly held sway on the roads, and even now on the annual volume of production in the world they are by far firmly hold the leading position. Components of the wheel – the rim and cd – of steel plate rollers and welded to each other. Steel does not have the corrosion resistance, for this reason that the wheel made out of it, cover the primer, enamel and lacquer. The main advantages of these wheels are traditionally low price and a sufficient ductility of the material, allowing the wheel does not burst on impact and become deformed.
The latter circumstance – a very important argument in favor of security, because the wheel is not destroyed completely, retaining some semblance of its geometry, not excluding the likelihood of a lack of depressurization tires. For the same reason, steel wheels after injury may subject to flattening (restoration). Of the shortcomings of forged wheels usually allocate their high mass, due to the required thickness of walls, lack of geometrical precision manufacturing, poor corrosion stability and not too diverse design. Cast alloy wheels are not satisfied with the construction characteristics of steel, engineers began to look for lighter materials. So, in the sixties were first wheels are made of aluminum alloy. And in what have become used, and magnesium (the other metals are not accustomed). In dealing with these materials, it became expedient to make the wheel casting.