A connector fails quietly and expensively. Subsea hydraulic and electrical connectors spend their life immersed, often part-made-up in crevice-prone geometries, and in naval service they also have to keep their magnetic signature low. The grade has to resist seawater and crevice corrosion first, then carry the mechanical load.
Hiduron® 130 is the established choice for subsea hydraulic and electrical connectors, including flying lead connectors for stab plates. It offers excellent seawater corrosion resistance, high crevice corrosion resistance, good anti-fouling behaviour and very low magnetic permeability. And it reaches those properties without additional heat treatment.
Where the connector body needs higher strength, the super duplex grades Alloy 32760 and Ferralium® 255 clear a PREN above 40. Hidurel® 5 covers the thrust pads, slipper pads, mechanical seals and bushes within subsea valve and connector assemblies, for its bearing and anti-friction behaviour and very low magnetic permeability. Where the service turns acid, Alloy 625 takes over.
Hiduron® 130 is equivalent to UNS C72400 and meets DIN 2.1504 and DTD 900/4805. Alloy 32760 is UNS S32760 (Zeron 100®, Rolled Alloys); Ferralium® 255 is UNS S32550; Alloy 625 is UNS N06625 (Inconel® 625, Special Metals).