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First Stainless Steel Boat

01 Oct 2014

Swedish Steel Yachts (SSY) has built a boat entirely out of stainless steel supplied by Outokumpu.


Outokumpu duplex stainless steel is used in the first ever boat built entirely out of stainless steel. The boat represents true innovation in the shipbuilding industry. The use of high strength and durable duplex stainless steel makes the boat entirely maintenance free and resistant to hard weather conditions during the winter.

Outokumpu’s units in Nyby, Avesta and Degerfors in Sweden delivered around 5t of super duplex 2507 stainless steel for the construction of the 10.5m long boat. The boat was constructed and built by Swedish Steel Yachts (SSY) based in Gävle, Sweden. The use of durable super duplex stainless steel grade 2507 in combination with SSY’s patented construction ensures that the hull of the boat can be made extremely thin without compromising strength. The hull and super structure of the boat weighs some 2000kg, one-third compared to common steel boats. The construction provides a progressive flexibility, which means that the hull moves in a controlled manner when subjected to powerful wave pressure. Mirror finish surface on the bottom of the boat also ensures that water elements do not attach on the boat surface.

“Usually, boats are produced using glass fibre or carbon steel, which requires a lot of maintenance in the form of painting. With the use of stainless steel, no maintenance is required. Additionally, thanks to the high strength of duplex, considerable weight savings in the boat structure were achieved since thinner material could be used”, says Pernilla Wangenborn, sales manager at Outokumpu’s sales office in Sweden.


Story: Stainless Steel World, 29 September 2014


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