Seamless hollow sections
Hollow structural sections
ArcelorMittal seamless hollow sections are produced through a hot manufacturing process in which a steel billet used as raw material is heated to a high temperature in order for it to become malleable. At this high temperature, the billet goes through four process steps: 1) The hot billet is forced through a piercing machine where the hollow section of the circular shape is obtained. 2) The hot hollow section is passed through a duo mill where it achieves final thickness. 3) The section is passed through a reeler machine for surface lamination. 4) The section passes through sizing roller stands where the final shape and dimensions of the tubes are achieved. Finally, end cutting, non-destructive testing (NDT), visual inspection, heat treatment, and end finishing are performed in a finishing area.
These products meet all of the EN 10210 standard requirements.
For the most exigent situations
ArcelorMittal seamless hollow sections offer designers a tubular structural element absolutely free of residual stresses for those applications where toughness and/or fatigue are key.
Furthermore, ArcelorMittal seamless hollow sections complement ArcelorMittal’s welded hollow sections offer when extremely thick products (reaching 50mm wall thicknesses) are required.