CHAL Aluminum

  When buyers compare seamless tubing, the debate often narrows to “drawn or extruded.” Both can be seamless, but they serve different engineering priorities. Understanding aluminum tube manufacturing methods ​ helps avoid overspecification, where a project pays for cold-drawn precision it does not need, or underspecification, where an extruded tube cannot meet tolerance, surface, or pressure requirements. Extruded seamless aluminum tube is formed by forcing heated aluminum through a die and mandrel system. CHAL describes two primary seamless routes: pushing a hollow billet through a die and mandrel at high temperature, or pushing a solid billet through a piercer press and then using a mandrel to pierce and extrude in a second forward stroke. The output has no longitudinal weld, good structural continuity, and the ability to produce relatively complex sizes in one pass. Extruded seamless tubing is efficient for larger diameters, heavier walls, and applications where productivity ma...