Copper and Copper Alloy Grades
Pure copper lacks the mechanical strength required for primary ship structures, so marine-grade copper alloys (such as cupro-nickels and brasses) are used for fluid transport, cooling systems, and hardware.
C70600 (90/10 Cupro-Nickel): Contains 90% copper and 10% nickel;
highly resistant to seawater corrosion and biofouling, making it ideal for
seawater piping and condenser tubes.
C71500 (70/30 Cupro-Nickel): Contains 70% copper and 30% nickel;
offers exceptional long-term durability and higher pressure/velocity
tolerance in aggressive marine environments.
C11000 (ETP Copper): Electrolytic tough pitch copper with high electrical
conductivity, heavily used for marine electrical wiring and power
distribution.
C12200 (DHP Copper): Phosphorus-deoxidised copper with high thermal
conductivity and superior weldability, commonly used in marine heat
exchangers and HVAC tubing.
Brass/Bronze Alloys (e.g., C36000, Gunmetal/Cast Bronze): Utilised for
marine hardware, propellers, valves, and hull fittings due to mechanical
strength and wear resistance.
]
Key Technical Properties:
Strength & Elasticity: High Tensile Strength (410−550 MPa) with a modulus of elasticity at roughly 200 GPa.
Ductility: Allows for deformation without failure, critical for resisting seismic loads.
Weldability & Fabrication: Easily welded and cut on-site, allowing for fast, modular assembly.
Fire & Corrosion Resistance: While not combustible, structural steel loses strength at temperatures above 500°C and requires anti-corrosion coating.
Fabrication and Connection:
Structural steel components are manufactured (rolled or welded) and then fabricated (cut, drilled, and welded) to exact specifications.
Connections: These are typically achieved through welding, bolting, or riveting to ensure high load-bearing capacity.
Steel for Structural Applications:
Construction of Bridges
Ship Building (Hull Structures, Decks, Bulkheads)
Industrial Structure
Commercial Towers
Hydro Power & Wind Farms
Modules, Offshore Platforms & Marine Engineering
Steel Structure Fabrication
Oil Rigs & Floating Structures
Naval & Commercial Vessels
Structural Steel:
Structural Steel is a highly Versatile Material that can be used in various Industries. Structural Steel is typically categorized into types based on criteria like Chemical Composition, Physical Properties and Usage. Here are the most common types of Steel:
Carbon Steels
Alloy Steels
Stainless Steels
