Quarto plate is hot rolled from slab. Desired thickness is achieved by passing the slab back and forth through the mill. Quarto plate mills tend to be dedicated to plate rolling, and can achieve a wider, thicker product than on a tandem mill.
Quench hardening is a mechanical process in which steel and cast iron alloys are strengthened and hardened. These metals consist of ferrous metals and alloys. The process is achieved by heating the material to a certain temperature. This produces a harder material by either surface hardening or through-hardening varying on the rate at which the material is cooled. The material is then often tempered to reduce the brittleness that may increase from the quench hardening process.
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