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Article | REF: M7903 V2

Rolling of long products - Rolls, sizing, defects

Author: Claude BATAILLE

Publication date: December 10, 2025 | Lire en français

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    3. Defects in rolled products

    Surface defects observed on rolled products can be classified into three main categories:

    • defects due to incorrect adjustment of the train;

    • defects appearing during rolling;

    • defects originating from the ingots.

    These defects may be combined on the same ingot. To prevent them from being transferred to the wire drawing mill, the billets are inspected and repaired during finishing.

    3.1 Defects due to incorrect wheel alignment

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