Boat mooring chains are heavy-duty chains used to secure vessels to docks or buoys, providing stability and safety. Anchor chains connect the anchor to the boat, ensuring a strong hold on the seabed to prevent drifting. Both are typically made of galvanized steel for corrosion resistance and durability in marine environments.

Boat Mooring Chain and Anchor Chain Specifications:

Size: 1/4" to 4" (6mm to 102mm) diameter, commonly in 3/8", 1/2", 5/8", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4"

Grade: Grade 2, Grade 3, Grade 30, Grade 43, Grade 70, Grade 100, Grade 120 (higher grades offer greater strength)

Material: Carbon steel, high-tensile steel, stainless steel (316 or 304), galvanized steel

Buoyancy: Chains are negatively buoyant (sink in water), but buoyancy aids can be attached

Viscosity: Not applicable (chains are solid metal)

Breaking Load: Varies by size and grade (e.g., 1/2" Grade 30: ~12,000 lbs, 1" Grade 100: ~250,000 lbs)

Proof Load: Typically 50-60% of breaking load

Link Types: Studlink (common for mooring/anchor chains), Studless, BBB, or short/long link

Coating: Hot-dip galvanized, zinc-plated, or bare (uncoated)

Corrosion Resistance: Varies by material (stainless steel > galvanized > carbon steel)

Weight: 0.2 lbs/ft (1/4") to 40 lbs/ft (4") depending on size and material

Standards: ABS, DNV, ISO 1704, Lloyd's Register, or other marine certifications