Aluminum Extrusion Troubleshooting

Transverse weld (billet to billet welds)

Problem Description

Weld lines form between successive billets.

Cause–Correction Mapping
  • Lubricant on billet face
    Cause in: Equipment

      Corrections

    • Evaluate alternate processes.

  • Oxide surface on billet face
    Cause in: Profile, Equipment

      Corrections

    • Modify extrusion practices (cut or weld when required).

      Advantage: Function of product end use.
      Disadvantage: Function of product end use.

Please note that the information provided in this article is intended to be a general guide to the causes and corrections of Transverse weld (billet to billet welds) in aluminum extrusion. However, it is important to note that the specific cause and correction of any particular defect will vary depending on the specific extrusion process, alloy, and other factors. Therefore, it is important to consult with an experienced and professional engineer to ensure that the correct diagnosis is made and the most suitable correction is chosen.