Sail Spars LLC of Connecticut, USA, chose Ferralium® 255-SD50 for the chainplates when refitting the classic 12m yacht Victory 83, exploiting the alloy's high strength and seawater corrosion resistance.
The yacht
Victory 83 was built for Peter De Savary as the British entry for the 1983 America's Cup. It finished second only to the controversially designed Australia II, and was considered the fastest 12m yacht of her type before designs moved to catamaran formats and wings. After racing at numerous European venues through the 1980s and 1990s, Victory 83 was bought in 2007 and relocated to the United States, then given a comprehensive refit of all standing and running gear, winches, spar, rudder and cockpit.
Why Ferralium® 255-SD50
Ferralium® 255-SD50 was selected for the chainplates. These fix the rod rigging to the hull, and can be prone to crevice corrosion where seawater is retained between the two components. With a pitting resistance equivalent number (PREN) exceeding 40, Ferralium® 255-SD50 offers corrosion resistance well beyond more standard stainless steels, bettered only by much more expensive alternatives.
It also provides a greater proof stress than alternative super duplex stainless steels, typically more than 10% higher. That extra strength adds security in use and supports light-weighting in the design - a useful advantage for racing yachts.
