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The steel plates produced by Sumitomo Metals are made from the finest materials manufactured under strict quality control through all production processes including raw materials treatment, iron-making, steel-making, and continuous casting. The steel plate manufacturing process is controlled by computer, and is fully automated to ensure accuracy and uniformity of products. Individual steel products are monitored by computer during the production process to ensure consistent quality at all stages. 2. Excellent Dimensional Accuracy As SMI’s steel plates are rolled using a full automated control system, including automatic gauge control equipment (AGC), they particularly excel in the accuracy of plate thickness. In addition, a γ-ray thickness gauge has been incorporated not only in the rolling line but also the finishing line for the purpose of achieving totally complete dimensional accuracy control. 3. High-Grade Surface Conditions Primary scale is completely removed by the highpressure water descaler installed at the exit of the reheating furnace. Secondary scale generated during rolling is also completely removed by steam jet high-pressure water. Meanwhile, since the reheating furnace and the cooling bed are of walking beam type, which is intended to prevent surface defects, products can be finished with a beautiful surface. Furthermore, by achieving surface correction using powerful levelers and strict inspection of both surfaces, we are proud to be able to deliver such products that excel in surface conditions and flatness. 4. Max. 5,160mm Width Available As our company has a plate mill with rolls of 5.33m in barrel length, we are able to produce extra-wide steel plates of a maximum 5,160mm in width. In addition, it is possible to manufacture steel plates of up to 25m in length and up to 40 tons in weight. 5. New Manufacturing Processes for Steel Plates In August 1975, Sumitomo Metals began to manufacture high-toughness and high-tensile strength steel plates by the SHT Process* (Sumitomo High Toughness Process), which was the first in the world. Subsequently, Sumitomo Metals developed a special controlled rolling process called the SSC Process (Sumitomo Special Controlled Rolling Process) and the DAC Process (Dynamic Accelerated Cooling Process) to produce high-tensile strength steel plates with excellent weldability. *SHT Process: A process that was developed from a controlled rolling process, and led to the development of TMCP technology. |
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