Marine Grade 5052 o-h112 10mm Thick Aluminium Sheet
Marine Grade 5052 O-H112 10mm aluminium sheet is a corrosion-resistant, weldable, and formable aluminum-magnesium alloy plate commonly selected for saltwater-facing structures. Built around magnesium as the primary alloying element, 5052 delivers a practical balance: strong marine corrosion performance, reliable fabrication, and stable flatness in thicker gauges like 10mm.
This product is frequently specified for boat hull components, deck plates, gangways, brackets, tanks, and marine cabinetry-anywhere a sheet must survive wet, chloride-rich environments without the weight and maintenance burden of steel.
What "5052" and "O-H112" Mean for Marine Buyers
5052 is an Al-Mg (aluminum-magnesium) alloy known for strong resistance to seawater and industrial atmospheres. It is not a heat-treatable alloy; its strength is driven mainly by composition and work hardening.
Temper matters in real-world fabrication:
| Temper | What it indicates | What you get in practice (10mm sheet) |
|---|---|---|
| O (Annealed) | Fully softened, stress-relieved | Maximum ductility, best for forming and bending; lower strength |
| H112 | Strain-hardened slightly (often mill-finished plate/sheet condition) | Improved handling rigidity and mild strength increase; still very workable |
In procurement terms, O-H112 is often used to describe supply that may be provided in O or H112 depending on mill route, thickness, and standard. Both are popular for marine fabrication because they stay predictable during cutting and welding.
Features of 5052 O-H112 10mm Aluminium Sheet
| Feature | What it means | Customer value |
|---|---|---|
| Marine corrosion resistance | Magnesium-rich alloy resists chloride attack better than many general-purpose alloys | Longer service life near seawater; less coating dependency |
| Excellent weldability | Compatible with common marine welding methods and fillers | Strong, clean joints for tanks, frames, and decks |
| Good formability (especially O temper) | Bends and forms with reduced cracking risk | Easier fabrication of brackets, channels, covers |
| Solid fatigue behavior for fabricated parts | Performs reliably in vibration-prone marine assemblies | Suitable for boats, ramps, platforms, enclosures |
| Non-magnetic, lightweight | About one-third the density of steel | Easier handling; improved payload efficiency |
| Consistent machining/cutting | Saws, waterjet, CNC routing, and plasma cutting are common | Faster shop throughput |
Typical Marine Applications (10mm Thickness Sweet Spot)
10mm (approximately 3/8") is a "workhorse" thickness: thick enough to feel structural, thin enough to cut and fabricate efficiently.
| Application area | Typical parts made from 10mm 5052 sheet | Why 5052 fits |
|---|---|---|
| Small craft and workboats | Deck plates, hatch covers, bulkhead panels | Corrosion resistance + weldability |
| Docks and waterfront equipment | Walkway panels, brackets, steps, access plates | Durable in wet, salty air |
| Tanks and fluid handling | Water tanks, gray water tanks, fuel-related enclosures (design-dependent) | Clean welding and good corrosion behavior |
| Marine hardware and fabrication | Mounting plates, equipment bases, reinforcement pads | Balanced strength and formability |
| Vehicle & coastal infrastructure | Coastal signage plates, equipment cabinets, protective shields | Strong oxidation resistance in marine atmospheres |
Chemical Composition (Typical, AA 5052)
Chemical limits vary slightly by standard and mill certification. Always confirm with the supplier's Mill Test Certificate (MTC) for compliance.
| Element | Typical composition range (%) |
|---|---|
| Magnesium (Mg) | 2.2–2.8 |
| Chromium (Cr) | 0.15–0.35 |
| Silicon (Si) | ≤ 0.25 |
| Iron (Fe) | ≤ 0.40 |
| Copper (Cu) | ≤ 0.10 |
| Manganese (Mn) | ≤ 0.10 |
| Zinc (Zn) | ≤ 0.10 |
| Titanium (Ti) | ≤ 0.10 |
| Aluminum (Al) | Balance |
Why this chemistry matters: Mg improves marine corrosion performance and strength, while Cr helps stabilize grain structure and supports good corrosion behavior in welded assemblies.
Mechanical Properties (Typical Values)
Exact mechanical values depend on temper, thickness, and the specific standard. The table below reflects common industry expectations for 5052 in O and H112-like conditions.
| Property | 5052-O (typical) | 5052-H112 (typical) |
|---|---|---|
| Ultimate tensile strength, MPa | 170–215 | 190–240 |
| Yield strength (0.2%), MPa | 65–95 | 80–130 |
| Elongation, % | 18–30 | 12–25 |
| Brinell hardness (HBW) | ~45–55 | ~55–70 |
For marine fabricators, the practical takeaway is simple: O is your best choice for aggressive forming; H112 offers a slightly firmer sheet feel for flat panels and welded builds.
Physical Properties (Useful Numerical Data)
| Property | Typical value |
|---|---|
| Density | ~2.68 g/cm³ |
| Thermal conductivity | ~130–150 W/m·K |
| Electrical conductivity | ~32–35 %IACS |
| Coefficient of thermal expansion | ~23.7 µm/m·K (20–100°C) |
| Melting range | ~607–649°C |
Technical Specifications (Product-Focused)
This section summarizes the specs customers typically need to quote, cut, and build quickly.
| Item | Specification |
|---|---|
| Product name | Marine Grade 5052 O-H112 Aluminium Sheet |
| Alloy | AA 5052 (Al-Mg) |
| Temper | O / H112 (as supplied per order and standard) |
| Thickness | 10mm |
| Standard size options | Commonly 1000×2000, 1250×2500, 1500×3000 mm (custom cutting available) |
| Surface finish | Mill finish (typical); protective film optional |
| Standards (common references) | ASTM B209 / EN 485 (based on region and mill) |
| Processing options | Saw cut, sheared edges, waterjet/CNC profiling, drilling, countersinking |
| Documentation | Mill Test Certificate (chemical + mechanical), heat/lot traceability (upon request) |
| Packaging | Export seaworthy packing; interleaving paper/film; palletized |
Corrosion Performance in Seawater Environments
5052 is widely accepted as a marine-grade alloy because it resists general corrosion well in splash zones, coastal air, and marine atmospheres. For best results in real installations:
| Exposure condition | Expected performance | Recommended practice |
|---|---|---|
| Coastal atmosphere | Excellent resistance | Rinse-down access helps; avoid stagnant salt deposits |
| Splash / spray zones | Very good | Use sound design to avoid crevices and trapped moisture |
| Dissimilar metal contact | Galvanic risk depends on pairing | Isolate from stainless/steel using gaskets, coatings, or washers |
| Welded regions | Typically stable when welded correctly | Use suitable filler (commonly 5356); clean and control heat input |
Design note: corrosion failures in marine builds are often crevice-driven or galvanic, not because 5052 "rusts." Good drainage, isolation, and smart fastener selection matter as much as alloy choice.
Fabrication: Cutting, Bending, and Welding
| Process | How 5052 O-H112 behaves | Shop-friendly tips |
|---|---|---|
| Cutting (saw/waterjet/plasma) | Clean cutting; minimal brittleness | Keep edges cool and clean for best weld prep |
| Bending/Forming | Excellent (especially O) | Use appropriate inside bend radius; avoid sharp tooling marks |
| Welding (MIG/TIG) | Excellent weldability | Clean oxide layer; choose marine filler (often ER5356) |
| Machining | Moderate | Use sharp tools; control chip evacuation |
For 10mm sheet, weld prep and joint design make a visible difference. A clean bevel, oxide removal, and stable fit-up reduce porosity and distortion.
Ordering Guidance (What to Specify)
| What to confirm | Why it matters |
|---|---|
| Temper (O or H112) | Impacts forming ease and final strength |
| Flatness requirement | Helps with deck plates and panel fit-up |
| Edge condition | Safer handling and better weld prep |
| Protective film | Prevents scratches on visible panels |
| Certification | Ensures traceability and compliance |
Marine Grade 5052 O-H112 10mm aluminium sheet is a durable, weldable, and corrosion-resistant Al-Mg alloy plate designed for saltwater and coastal environments. With strong resistance to marine corrosion, excellent fabrication performance, and practical strength in 10mm thickness, it is widely used for boat parts, deck plates, marine tanks, dock hardware, and coastal structures. Available with mill certification and common standards support (ASTM B209 / EN 485), 5052 O-H112 delivers reliable performance for marine fabrication where long service life and easy welding matter most.
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