Glossary
Mill Scale
Steel
Mill scale forms on the surface of steel when oxygen reacts with very hot metal to form iron oxides. This occurs immediately after casting, and during reheating and hot rolling. The scale, which can range in size from a few microns to several centimetres across, has to be removed, otherwise it will damage the surface finish of the steel during any subsequent rolling. High pressure water jets are used to blast away the scale, and on a hot strip mill this occurs as the steel passes down the run-out table from the roughing mill.
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Anonymous
Very good overview of the weekly steel market.
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