5043 Aluminum alloy,Aluminum 5043 alloy,E FORU

### **Introduction to 5043 Aluminum Alloy** **5043 Aluminum Alloy** is a non-heat-treatable aluminum-magnesium-manganese alloy primarily known for its use in **welded structures** and its excellent **corrosion resistance in marine environments**. It is part of the Al-Mg family (5xxx series) and is strengthened by the solid-solution hardening effect of magnesium and manganese. A key characteristic of 5043 is its reliable performance after welding, making it a preferred choice for fabrications like ship hulls and offshore structures. --- ### **1. Chemical Composition (Weight %)** The typical chemical composition of 5043 Aluminum Alloy is designed to balance strength, weldability, and corrosion resistance. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Aluminum (Al)** | Balance | Base Element | | **Magnesium (Mg)** | 2.5 - 3.5 | Primary strengthening element; significantly increases strength and improves work hardening. | | **Manganese (Mn)** | 0.50 - 1.0 | Enhances strength, improves work hardening response, and refines grain structure. | | **Chromium (Cr)** | 0.05 - 0.25 | Improves resistance to stress corrosion cracking and helps control grain structure. | | **Copper (Cu)** | ≤ 0.10 | Impurity; kept very low to maintain excellent corrosion resistance, especially in seawater. | | **Iron (Fe)** | ≤ 0.40 | Impurity; controlled to prevent brittleness. | | **Silicon (Si)** | ≤ 0.25 | Impurity; controlled to prevent the formation of brittle Mg₂Si phases, which can impair ductility. | | **Zinc (Zn)** | ≤ 0.25 | Impurity; kept low. | | **Others (each)** | ≤ 0.05 | - | | **Others (total)** | ≤ 0.15 | - | --- ### **2. Physical Properties** The following are typical physical properties for 5043 Aluminum Alloy. | Property | Value / Description | | :--- | :--- | | **Density** | ≈ 2.68 g/cm³ | | **Melting Range** | ≈ 600 - 650 °C | | **Electrical Conductivity** | ≈ 33-37 % IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ≈ 125 - 135 W/m·K | | **Coefficient of Thermal Expansion** | ≈ 23.8 x 10⁻⁶ /K (at 20-100°C) | | **Modulus of Elasticity** | ≈ 70 GPa | --- ### **3. Mechanical Properties (Typical for Sheet/Plate)** Mechanical properties vary with temper. The "H" tempers indicate strain-hardened states. | Temper | Tensile Strength (MPa) | Yield Strength (0.2% Offset, MPa) | Elongation (%) | | :--- | :--- | :--- | :--- | | **O (Annealed)** | 230 - 280 | ≥ 110 | ≥ 16 | | **H32 / H34** | 270 - 320 | 210 - 260 | 8 - 14 | | **H112 (As-fabricated)** | 240 - 290 | ≥ 120 | ≥ 12 | *Note: Values are approximate and can vary based on the specific product form and gauge.* --- ### **4. Key Characteristics & Advantages** * **Excellent Marine Corrosion Resistance:** Demonstrates superior resistance to saltwater corrosion, making it a standard for marine applications. * **Good Weldability:** Can be easily welded using common techniques like MIG and TIG without post-weld heat treatment. It retains good strength in the welded condition. * **Good Strength & Formability:** Offers a solid combination of medium-high strength and the ability to be formed into complex shapes, especially in softer tempers. * **Resistance to Stress Corrosion Cracking (SCC):** The chemical composition, particularly the controlled Mg content and addition of Cr, provides good resistance to stress corrosion cracking, which is critical for welded structures under load. --- ### **5. Product Applications** 5043 Aluminum Alloy is widely used in marine and other structural applications: * **Marine & Shipbuilding:** * Hull plating and superstructures for boats and ships. * Decks, bulkheads, and marine fittings. * **Offshore Structures:** * Platforms, walkways, and components exposed to aggressive sea environments. * **Pressure Vessels & Tanks:** For storing liquids and gases. * **Transportation:** * Body panels and structural parts for trucks and specialized vehicles. * **General Welded Structures:** Any fabrication requiring a good strength-to-weight ratio and corrosion resistance. --- ### **6. International Standards** 5043 Aluminum Alloy is recognized under several major international standardization systems. | Standard Body | Alloy Designation | Common Product Standards | | :--- | :--- | :--- | | **ISO** | **AlMg3** | ISO 209 | | **EN (European Norm)** | **EN AW-5043** | EN 573-3, EN 485 (for sheet) | | **AA (Aluminum Association)** | **5043** | AA Teal Sheets / Registration Record | | **JIS (Japanese Standard)** | **A5043** | JIS H 4000 |

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1797 gallon liquid totes Special package is available on request.