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Manufacturing Metallurgy

Metal Extrusion: Hot and Cold Extrusion Processes, Dies, and Defects

Complete guide to metal extrusion. Covers direct and indirect hot extrusion, cold extrusion, billet-on-billet, die design, extrusion ratio, common defects (fir tree, piping), and aluminium profile production.

Dec 12, 2025 · 43 min read Read →