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At hot rolling temperatures, an inner layer of wüstite, FeO, exists between the steel and magnetite. "At elevated temperatures, FeO constitutes about 85% of the scale thickness, Fe 3 O 4 about 10 to 15% and Fe 2 O 3 about 0.5 to 2%. During slow cooling [below 1040 °F] of hot-rolled coils of hot-rolled strip [and heavy shapes], most of the FeO prime quality q235b oil transportation tolerance RollingU003en Cold-Rolled Steel Sheets and Coilsby cold rolling. The Cold-Rolled Steel Sheets and Coils have their crystal grains enlarged in the rolling direction, making the texture hardened and brittle. In the annealing process, the coils are continuously heated in reductive atmospheric gas to form uniform crystals which meet quality U001en Hot-Rolled Steel Sheets and CoilsQuality Products of consistent quality are manufactured under strict quality control, utilizing excellent equipment and techniques, and drawing on our wealth of experience. Wide Variety of Sizes Size are available from 1.2 mm to 25.4 mm in thickness and from 600
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