Self-annealing at hot rolling

Many of flat rolled products manufacturers are never subjected to a batch annealing practice. Prime high volume examples are AlMnMg (3004, 3014) and AlMg4.5Mn (5182) families of alloys and the similar is used for deep drawn products. If the exit temperature of the last hot rolling pass is high that the material self-anneals, which promotes to form the earing 45° from the earing 90° of the hot rolling. The optimal rate of the two types of earings has to result a material without earing.