The wide-range extra-deep drawing steel series with maximum width of 2070mm used for exposed auto body could be produced by advanced hot-dipping manufacturing equipments in WISCO, including 250t converter, 2250mm continuous hot rolling system, 2180mm pickling system and 2080mm hot-dipping system. The chemical composition of Ti-IF steel, high final rolling and coiling temperatures are controlled strictly to achieve width of 2083-2095mm hot rolling steels, which are the important raw material for galvanizing or galvanealing products. When the galvanizing process are performed by setting inter-critical annealing temperature on 830-840 °C and strip speed on 100m/min with adequate skin rolling ratio, the stable mechanical and surface properties could be reached for the wide-range steels.
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