A unique solution for a unique ship
The Vasa is a globally unique cultural treasure—but despite its impressive size, it is highly fragile. Chemical degradation of the oak wood, dating back to the 1620s, has significantly weakened the hull. Although the movement is gradual, over time it could lead to catastrophic consequences, with the ship ultimately at risk of capsizing.
As part of the collaboration with the Vasa Museum, Alleima is providing its world-leading expertise and high-performance SAF™ 2507 super duplex stainless steel for a customized internal steel support. This support will extend from the keel to the upper deck, helping redistribute the load from the decks and beams, ultimately slowing the hull's movements.
Thanks to the high strength of Alleima’s material, less material is required, allowing the weight of the internal steel support to be reduced. This minimizes the number of holes that need to be made into the ship’s hull. With Alleima’s advanced materials, the Vasa Museum can preserve the ship with less impact on its hull than would otherwise have been necessary.
The internal support is a critical part of “Support Vasa,” the Vasa Museum’s extensive project aimed at preserving the ship for the future. The aim is to complete the work on the new support structure by 2028, just in time for the Vasa’s 400th anniversary.