Steel sheet
A steel plate, high-quality technology, applied to the field of steel plates containing a high concentration of Mn, can solve problems such as difficulty in ensuring sufficient weldability, restrictions on the use of structural members, etc.
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[0191] The steel plate of this application is demonstrated more concretely with reference to an example. However, the following examples are examples of the steel sheets of the present application, and the steel sheets of the present application are not limited to the aspects of the following examples.
[0192] 1. Manufacture of steel plates for evaluation
[0193] Steels having the chemical compositions shown in Table 1 were melted in a converter and continuously cast to obtain 245 mm thick slabs.
[0194] Table 1
[0195]
[0196] The down arrow in Table 1 means the same as the previous column.
[0197] The obtained slabs were hot-rolled under the conditions shown in Table 2 to produce hot-rolled steel sheets with a thickness of 2.6 mm. Next, the obtained hot-rolled steel sheets were pickled and cold-rolled at the cold-rolling ratios shown in Table 2 to produce cold-rolled steel sheets with various thicknesses shown in Table 2.
[0198] Table 2
[0199]
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