Practically all new rolling mills today are equipped with hydraulic screwdowns for hot or cold rolling. A disadvantage of mechanical screwdowns is the fact that you cannot adjust accurately while the screwdowns are under pressure.
AC variable frequency drives vary in horsepower from 1 to 10,000. AC variable frequency drives are energy efficient. They only use the amount of electrical energy required for the job. In rolling mills, it is very common to use a fraction of the horsepower that is available.
There are many different sizes and types of stand-alone rolling mills. They can be 2-high or 4-high. They can be used for large reductions or skin passing a single piece, strip, or plate. Stand-alone rolling mills can reduce expensive exotic alloys that cost more than the price of gold.
One of the purposes of alloy carbon steel is to improve the quality and physical properties of carbon steel. Many carbon steels have other alloys mixed in such as chrome, molybdenum, vanadium, manganese, silicon, and many other elements.
