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Nowadays, quality development is a growing challenge, which places a heavy burden on economic operators, especially on smaller companies. ISD Dunaferr Zrt is the largest steel company in Hungary with its annual steel production of about 2 million tons, but it is small on a global scale. Taking advantage of the opportunities, locating the hidden problems, qualitative development and productivity enhancement can be realized without major investment. This study points out the steel production and casting parameters that have the greatest impact on the quality of the hot rolled product (sheet and coil) and touches upon the effect of rolled product final thickness on the ratio of downgrading. As a result the examination of overheating shows correlation with the ratio of downgrading, but the age of the mould does not. Regarding the thickness of the rolled product, it can be stated that in the case of thicker products (above 9 mm) the ratio of downgrading increases.

Effect of the Production Conditions of Continuously Cast Steels on the Degree of Hot Rolled Product Downgrading