Deck equipment takes salt spray, wave impact and intermittent immersion, and winch and tow gear does it under high, cyclic load with parts that run against each other. The grade choice runs from copper alloys for the loaded, corrosion-critical parts down to Alloy 316L for general hardware in sheltered positions.
Hiduron® 130 is used for naval winches, seawater valves and tow and winch fittings, for its excellent seawater and crevice corrosion resistance and very low magnetic permeability. Hidurel® 5 covers heavily loaded winch and bearing components, with excellent bearing and anti-friction properties, particularly against hardened steel, and no loss of impact strength down to -196 degrees C.
For general deck hardware in sheltered, intermittent exposure - handrails, deck eyes, shackles and anchor rope brackets - Alloy 316L is the workhorse. And Fermonic® 60 is specified for shackles and running parts where anti-galling matters. Fermonic® 50 gives a non-magnetic option for masts, fixtures and fittings.
Hiduron® 130 is equivalent to UNS C72400 and meets DIN 2.1504 and DTD 900/4805. Fermonic® 50 and Fermonic® 60 are UNS S20910 and S21800, known elsewhere as Nitronic® 50 and Nitronic 60 (Cleveland-Cliffs). Send us the component and its exposure and we will confirm the grade.