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Defects Affecting Extrusion – Dullness on As-Extruded Surfaces


Product Information

•    Title:  Defects Affecting Extrusion – Dullness on As-Extruded Surfaces

•    Author:  Jerome Fourmann

•    Author Company:  Rio Tinto Aluminum

•    Volume:  Vol. 75, No. 5

•    Year:  2017

•    No. Pages:  2.5

•    Description:  The 20th article in a series, this article addresses the dullness conditions on as-extruded surfaces. Mill finish surface roughness is usually visible at the press and can be encountered in a number of aluminum alloys, such as dilute Al-Mg-Si alloys of theAA6xxx series type. Such conditions typically result in an unacceptable surface and can affect downstream processes, such as anodizing, having a detrimental effect on press recovery and scrap rate. The characteristics, appearance, causes, and remedies for the defect are discussed.

•    Companies Mentioned:  N/A

Product Code: DEF134SC31


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