Laminated aluminum tubes are not made of a single material, but rather consist of a multi-layered composite structure:
Base layer: Typically made of 3000 series (e.g., 3003) or 5000 series (e.g., 5052) aluminum alloys. These alloys possess excellent corrosion resistance, ductility, and strength.
For example, a typical composition of 3003 aluminum alloy is manganese (1.0%-1.5%) and aluminum (balance), with a tensile strength reaching 110-200 MPa.
Functional layer: The outer layer may be covered with a plastic film such as polyethylene (PE), polypropylene (PP), or an epoxy resin coating for insulation and corrosion protection; some high-end products may have a stainless steel film layered on top to improve wear resistance.
