Alcan.
Created and patented by Alcan Marine, Sealium optimises the overall productivity of shipbuilders and the performance of vessels in general as it makes them more robust, safer, and user-friendly. In just a few years, Sealium has become the international industry reference for fast ferries.
Applications
Sealium may be used wherever a stronger welded aluminum structure is desired, from hulls to superstructures. Marine structures benefit from the excellent corrosion resistance offered by Sealium . Smaller boats (< 50m) benefit from improved scantlings, which translate into structural weight savings on patrol craft, increased strength on work boats or added interior space in luxury yachts. Larger vessels (> 50m) profit from the increased strength and improved fatigue behavior of Sealium . Cruise ship superstructures can be lightened further while improving stability and not compromising strength or corrosion resistance.
Advantages
- 15 % higher welded yield strength than standard 5083 alloy:
- Increased margin of safety from same scantlings.
- Significant weight savings from reduced or modified scantlings.
- Proven improved corrosion resistance.
- Increased fatigue strength.
- Same usage properties as 5083 alloy:
- Formability: same cutting, bending and shaping.
- Welding: no change in welding procedure,consumables or heat deformation.
Thickness
- Refer to data Sheets
Mechanical Properties
- Refer to data Sheets
Corrosion Resistance
Marine grade Sealium is tested as per ASTM B209, and therefore capable of exhibiting no evidence of exfoliation corrosion. Intergranular corrosion (IGC) and stress corrosion (SCC) tests (Interacid test and ASTM G44) as well as ASSET tests (ASTM G66) on base and welded metal samples of Sealium show significantly better corrosion resistance than standard 5083-H116. Accelerated (artificial ageing for 7 days at 100¡C) and natural exposure (marine atmosphere and immersion) as well as experience have proven the long term corrosion resistance of Sealium to be markedly improved over that of 5083-H116.
Type Approval
Sealium Sheets/Plates have been approved by the major classification societies :
- American Bureau of Shipping, USA (ABS)
- Bureau Veritas, France (BV)
- Det Norske Veritas, Norway (DNV)
- Germanisher Lloyd, Germany (GL)
- Lloyd's Register of Shipping, UK (LR)
- Nippon Kaiji Kyokai, Japan (Class NK)
- Registro Italiano Navale, Italy (RINA)
