5027 Aluminum alloy,Aluminum 5027 alloy,E FORU

### **Introduction to 5027 Aluminum Alloy** **5027 Aluminum Alloy** is a non-heat-treatable aluminum-magnesium alloy known for its very high strength among the 5xxx series alloys. Its strength is derived primarily from its high magnesium (Mg) content and the strain-hardening from various tempers. This alloy offers an excellent combination of high strength, good formability, and outstanding corrosion resistance, especially in marine and industrial atmospheres. It is often used in demanding structural applications where weight savings and durability are critical. --- ### **1. Chemical Composition (Weight %)** The typical chemical composition of 5027 Aluminum Alloy as per international standards is outlined below. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Aluminum (Al)** | Balance | Base Element | | **Magnesium (Mg)** | 4.5 - 5.4 | Primary strengthening element; significantly increases strength via solid solution hardening. | | **Manganese (Mn)** | 0.6 - 1.2 | Enhances strength, improves work hardening response, and refines grain structure. | | **Copper (Cu)** | ≤ 0.10 | Impurity; kept very low to maintain excellent corrosion resistance. | | **Iron (Fe)** | ≤ 0.50 | Impurity; controlled to prevent negative impact on formability and surface finish. | | **Silicon (Si)** | ≤ 0.30 | Impurity; controlled to prevent the formation of brittle Mg₂Si phases. | | **Zinc (Zn)** | ≤ 0.20 | Impurity; kept low to maintain corrosion resistance. | | **Chromium (Cr)** | ≤ 0.30 | May be added to control grain structure and improve toughness. | | **Titanium (Ti)** | ≤ 0.20 | Often added as a grain refiner to improve mechanical properties and weldability. | | **Others (each)** | ≤ 0.05 | - | | **Others (total)** | ≤ 0.15 | - | --- ### **2. Physical Properties** The following are typical physical properties for 5027 Aluminum Alloy. | Property | Value / Description | | :--- | :--- | | **Density** | ≈ 2.67 g/cm³ | | **Melting Range** | ≈ 575 - 635 °C | | **Electrical Conductivity** | ≈ 28-33 % IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ≈ 115 - 125 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/Strip)** Mechanical properties are highly dependent on the temper (condition). The "H" tempers indicate strain-hardened states, with H3X tempers indicating stability against age-softening. | Temper | Tensile Strength (MPa) | Yield Strength (0.2% Offset, MPa) | Elongation (%) | | :--- | :--- | :--- | :--- | | **O (Annealed)** | 240 - 280 | ≥ 120 | ≥ 16 | | **H28 / H38** | 350 - 390 | 310 - 350 | 5 - 9 | | **H18 / H38** | 380 - 420 | 350 - 390 | 4 - 7 | *Note: The H38 temper is specifically stabilized to prevent a gradual decrease in strength and an increase in ductility over time (age-softening), which is a concern for alloys with high Mg content like 5027.* --- ### **4. Key Characteristics & Advantages** * **Very High Strength:** Offers one of the highest strength levels available in non-heat-treatable aluminum alloys, making it ideal for structural components. * **Excellent Corrosion Resistance:** Demonstrates superb resistance to seawater and industrial chemicals. It is highly resistant to marine atmosphere corrosion. * **Good Formability:** Can be formed and stamped, though it requires more force than lower-strength alloys like 5026. Best formability is achieved in the "O" temper. * **Good Weldability:** Can be readily welded using MIG and TIG methods. However, welded joints may have reduced strength in the heat-affected zone (HAZ). * **Stabilized Tempers Available:** The H3X tempers (e.g., H38) are designed to be stable, preventing age-softening at room temperature, which is a critical feature for long-term performance. --- ### **5. Product Applications** 5027 Aluminum Alloy is specified for demanding applications across several industries: * **Marine & Shipbuilding:** * Hull plating for high-speed boats and military vessels. * Superstructures, decks, and bulkheads. * Marine fittings and components requiring high strength-to-weight ratio. * **Transportation:** * Flooring and structural members for truck trailers and bus bodies. * Armored vehicle panels where lightweight and ballistic resistance are needed. * **Pressure Vessels & Tanks:** For storing liquids and gases, leveraging its combination of strength and corrosion resistance. * **Construction & Architecture:** Used in bridges, walkways, and offshore platforms where exposure to harsh environments is a concern. * **Military & Defense:** Various structural and armored applications. --- ### **6. International Standards** 5027 Aluminum Alloy is recognized under several major international standardization systems. | Standard Body | Alloy Designation | Common Product Standards | | :--- | :--- | :--- | | **ISO** | **AlMg5** | ISO 209 | | **EN (European Norm)** | **EN AW-5027** | EN 573-3, EN 485 (for sheet) | | **AA (Aluminum Association)** | **5027** | AA Teal Sheets / Registration Record | | **DIN (German Standard)** | **AlMg5** | DIN 1725-1 / DIN EN 573 | | **JIS (Japanese Standard)** | **A5027** | 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 1793 gallon liquid totes Special package is available on request.