Marine & Offshore Metals
Saltwater-rated aluminum, stainless steel & brass. Aluminum, stainless steel, and brass alloys rated for saltwater and marine environments.
Recommended Alloys
Marine-grade metals across three metal families — each serving a different role in saltwater environments.
5086-H116
Premium marine aluminum
ABS-certified for boat hulls and marine structures. The premium choice for saltwater exposure — superior corrosion resistance with good weldability and strength. H116 temper specifically designed for marine service.
5083-H321
Welded marine structures
Highest strength non-heat-treatable marine aluminum. Ideal for welded boat structures, hulls, and superstructures where strength after welding matters most.
5052-H32
General saltwater service
Excellent corrosion resistance at a lower cost point than 5086. Standard for marine tanks, hardware, and general saltwater-exposed components. Easy to form and weld.
316 / 316L Stainless
Marine-grade hardware
Molybdenum content provides superior resistance to chloride pitting and crevice corrosion. The standard for marine fasteners, fittings, and any stainless component in saltwater environments.
464 Naval Brass
Seawater-exposed fittings
Purpose-built for seawater service. Naval brass adds tin to the standard brass composition for dezincification resistance — critical for underwater valves, fittings, and propeller components.
Building a boat?
Start with 5052-H32 for most marine projects. Upgrade to 5086-H116 for hull plating where ABS certification is required. Use 316 stainless for hardware and 464 naval brass for through-hulls.
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