5456 H116 marine aluminum, as a representative high-magnesium Al-Mg alloy, is increasingly used in hull structures, offshore platforms, and critical components exposed to highly corrosive marine environments due to its outstanding overall performance.
As a professional marine aluminum manufacturer, MC Aluminum provides custom cutting services, which play a key role in improving shipbuilding efficiency and reducing material waste.
Introduction
In the field of marine aluminum materials, the 5xxx series aluminum-magnesium alloys are the most widely used and promising material system. Among them, 5083, 5086, and 5456 are recognized as the three core grades of 5xxx series marine aluminum plates.
5083 aluminum plate is the most representative marine-grade alloy, available in tempers such as O, H111, H112, H116, and H321. It offers moderate strength, good corrosion resistance, and excellent formability, and is widely used for primary hull structures.
5456, however, sits at the top of the performance hierarchy among these alloys-it is the highest-strength commercially available non-heat-treatable aluminum alloy, with a magnesium content of 4.7%-5.5%, significantly higher than 5083's 4.0%-4.9%.
The H116 temper is specifically designed for marine environments. It provides superior resistance to exfoliation corrosion and is particularly suitable for medium and thick marine aluminum plates. Compared with standard H111 and H112 tempers, H116 undergoes stricter stress control and corrosion-resistance validation during production.
Performance Advantages of 5456 H116 Marine Aluminum Plate
Higher Strength
5456 H116 marine aluminum offers tensile strength ≥310 MPa and yield strength ≥220 MPa, significantly higher than 5083 H116. With greater load-bearing capacity at the same thickness, it is ideal for high-speed vessels, workboats, heavy-duty decks, and hull side plating.Outstanding Corrosion Resistance
Exceptional resistance to seawater corrosion, salt spray, and humid marine atmospheres. Specifically engineered to suppress exfoliation and intergranular corrosion, offering superior durability compared with standard H32 or H112 tempers.Excellent Weldability
Suitable for MIG and TIG welding processes, with high post-weld strength retention and low susceptibility to cracking.Lightweight Advantage
Aluminum density is only about one-third that of steel, significantly reducing vessel weight, increasing speed, lowering fuel consumption, enhancing payload capacity, and extending service life.Superior Low-Temperature Toughness
Maintains toughness without embrittlement at low temperatures, making it suitable for refrigerated vessels, cold-storage compartments, and polar or cold-region ships.High Fatigue Strength
5456 aluminum exhibits excellent resistance to fatigue cracking, which is critical for the long-term durability of high-speed vessels.Non-Magnetic Properties
Ideal for minesweepers, workboats, yachts, and other vessels sensitive to magnetic interference.
Technical Specifications
| Alloy | 5456 |
| Temper | H116 |
| Thickness | 3.0-50 mm |
| Width | 1000-2650 mm |
| Length | 1000-16000 mm |
| Applications | Hull plating, decks, bulkheads, and structural components |
| MOQ | 1-3 tons |
Physical Properties
| Property | Value | Unit |
| Density | ~2.66 | g/cm³ |
| Elastic Modulus (Young's) | ~70 | GPa |
| Poisson's Ratio | 0.33 | - |
| Thermal Conductivity | ~120 | ×10⁻⁶/°C |
| Electrical Conductivity | ~29-32 | % IACS |
| Melting Point | ~605-650 | °C |
Mechanical Properties of 5456 H116 Aluminum
| Property | Typical / Standard Value | Unit |
| Tensile Strength (Rm) | 315-405 | MPa |
| Yield Strength (Rp0.2) | 230-315 | MPa |
| Elongation | ≥10-12 | % |
| Brinell Hardness | ~90 | HB |
| Fatigue Strength (Typical) | ~170 | MPa |
Applications of 5456 Marine Aluminum Plate
(1) Hull Structures
Bottom plating, side shells, decks, bulkheads, and superstructures
(Higher strength than 5083, suitable for heavy-load and high-speed vessels)
(2) Vessel Types
High-speed passenger ships, ferries, yachts (lightweight & corrosion-resistant)
Fishing vessels, workboats, landing craft, minesweepers (non-magnetic & impact-resistant)
Offshore platforms, piers, and marine equipment structures
Custom Cutting Services for Marine Aluminum Plates
In practical shipbuilding and offshore projects, standard aluminum plate sizes often fail to match design drawings precisely. Custom cutting of 5456 H116 marine aluminum effectively improves material utilization and construction efficiency.
Key Advantages of Custom Cutting
High Dimensional Accuracy
CNC cutting according to drawings ensures tight tolerances and minimizes on-site rework.Improved Material Utilization
Optimized nesting reduces scrap and overall material costs.Shorter Delivery Cycle
Cut plates can be directly welded or assembled, accelerating project timelines.Adaptability to Complex Structures
From irregular-shaped plates and stiffeners to large-format panels, custom solutions are readily available.
About MC Aluminum
As a professional marine aluminum manufacturer, MC Aluminum supplies both 5xxx series (5083, 5052, 5456, etc.) and 6xxx series (6082, 6063, etc.) marine aluminum alloys.
Our products are certified by authoritative classification societies such as DNV, ABS, and CCS. We offer custom services, free samples, and export to multiple countries and regions worldwide, with reliable after-sales support.
Original Source: https://www.marinealum.com/a/custom-cut-5456-h116-marine-aluminum.html
Tag: 5456 marine aluminum 5456 H116 marine aluminum plate 5083 marine aluminum 5086 marine aluminum classification society certified marine aluminum plate marine grade aluminum plate 5xxx series marine aluminum alloy marine aluminum manufacturer
