The stainless steel alloy super duplex 2507 used in our hulls has been developed by metallurgists at Sandvik Materials Technology AB. The alloy is extremely resistant to corrosion and fracture caused by saltwater. The steel hull retains its mechanical properties despite tough conditions over a long period of time. This is a major advantage compared to glass fibre, carbon fibre and aluminum which may deteriorate over a number of years. The superduplex steel’s mechanical properties in combination with the patented design allows our boats to be built with much thinner steel then required for typical steel vessels. Our hulls are lightweight yet durable and rigid - awarding the vessel's loading capabilities and running costs. . The interior consists of modular units that are manufactured and easily installed into predrilled holes in exactly the right position in the boat. The modular system also makes it easy to customize each boat’s interior.


All of our hulls are made of super duplex 2507 (EN 1.4410), a material which is up to five times stronger than the strongest aluminium and ordinary steel used in marine applications. The super duplex welds are far superior to aluminium welds.


The hull's interior structural design is patented by our founder Håkan Rosén and is limited to the SSY brand. The unique design allows a more flexible outer skin absorbing the energy in a motion and across a larger area - giving us the opportunity to use less material than in a traditional design. The structural design complies with world wide classifications societies such as CE/ISO, ABS, DNV GL, BV etc.


The hull does not require any protective paint, nor does the underwater hull require corrosion protective or antifouling paint for sustainable purposes. If the underwater hull is Marine Grade ® polished, it does not require any antifouling paint when used often enough in planing speed*. Either way, for yacht applications the owner may want his or hers yacht finished with a painted surface which we can facilitate. Thanks to the durable and near maintenance-free steel surface, a SSY vessel does not require expensive hauling for re-protection or re-painting the hull surface in order to keep the vessel structurally sound.


All of our vessels up to date** are designed by our in-house Designer, M.Sc Engineer Adrian Falk and his team. Our ambition for the SSY brand is to offer stylish yet modern vessels with the perfect compromise between performance and comfort. Mr. Falk and his team achieves the most effective structural design using modern softwares (FEM & CAD) used in the cutting edge automotive industry - which is unique in the marine industry, especially in boat building.


Statistically, failure in operation is most likely caused by an electrical fault. That is why we use professional standard electrical installations on all of our vessels which tend to last longer and perform in the toughest conditions. Double pole switching is standard, minimizing current leakage and prevailing the power bank's capacity. All of our vessels aimed for professional use have systems and interior to fit year-around usage.

*Empirically verified in Swedish waters and in an R&D-project located in French Atlantic waters together with Sandvik Materials Technology AB.

** The first SSY POC M 10.5 was designed by Claes Lundström