5056-H18 Aluminum alloy,Aluminum 5056-H18 alloy,E FORU

### **Technical Datasheet: 5056-H18 Aluminum Alloy** --- #### **1. Material Overview** **5056-H18 Aluminum Alloy** is a high-strength strain-hardened aluminum-magnesium alloy known for its exceptional strength and excellent corrosion resistance, particularly in marine environments. The H18 temper indicates the material has been cold worked to achieve a full-hard condition, providing the highest practical strength obtainable through strain hardening alone. This alloy is widely recognized for its superior performance in demanding applications. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | Al | Balance | Base metal | | Mg | 4.5-5.6 | Primary strengthening element | | Mn | 0.05-0.20 | Grain refinement | | Cr | 0.05-0.20 | Corrosion resistance | | Cu | ≤0.10 | Impurity control | | Fe | ≤0.40 | Impurity control | | Si | ≤0.30 | Impurity control | | Zn | ≤0.10 | Impurity control | | Others (each) | ≤0.05 | - | | Others (total) | ≤0.15 | - | --- #### **3. Physical Properties** | Property | Value | Test Standard | |----------|-------|---------------| | Density | 2.64 g/cm³ | ASTM B193 | | Melting Range | 568-638 °C | - | | Electrical Conductivity | 22-27% IACS | ASTM B193 | | Thermal Conductivity | 96-106 W/m·K | ASTM E1461 | | Coefficient of Thermal Expansion | 24.1 × 10⁻⁶/K (20-100°C) | ASTM E228 | | Modulus of Elasticity | 71.0 GPa | ASTM E111 | | Specific Heat Capacity | 900 J/kg·K | - | --- #### **4. Mechanical Properties (Typical)** | Property | Value Range | Test Standard | |----------|-------------|---------------| | Tensile Strength | 435-485 MPa | ASTM B557 | | Yield Strength (0.2% Offset) | 405-455 MPa | ASTM B557 | | Elongation (50mm) | 6-10% | ASTM B557 | | Hardness (Brinell) | 105-120 HB | ASTM E10 | | Shear Strength | 235-255 MPa | ASTM B831 | | Fatigue Strength (10⁷ cycles) | 150-170 MPa | ASTM E466 | | **Bend Radius (90°)** | **4-5×t** | **ASTM B311** | --- #### **5. Key Characteristics** - **Exceptional Strength**: One of the strongest non-heat-treatable aluminum alloys - **Superior Corrosion Resistance**: Excellent performance in marine environments - **Good Fatigue Resistance**: Suitable for dynamic loading applications - **Limited Formability**: Restricted to simple bending operations - **Excellent Stress Corrosion Resistance**: Performs well under sustained tension - **Good Anodizing Response**: Accepts surface treatments well --- #### **6. Processing Characteristics** **Forming Operations:** - Limited to simple bending - Minimum bend radius: 4-5× thickness - Not recommended for deep drawing - Significant springback requiring compensation - Suitable for straight roll forming **Joining Methods:** - GTAW (TIG) - Requires special procedure - GMAW (MIG) - With proper technique - Resistance welding - Good - Adhesive bonding - Excellent - Mechanical fastening - Preferred method - Riveting - Excellent **Surface Treatments:** - Anodizing - Very good with proper pretreatment - Painting - Good adhesion with surface preparation - Powder coating - Excellent results - Chemical conversion - Good corrosion protection - Electroplating - Suitable with proper preparation --- #### **7. Product Applications** **Aerospace & Defense:** - Aircraft structural components - Missile and rocket parts - Military vehicle components - Defense equipment housings **Marine & Offshore:** - Boat hull components - Marine hardware and fasteners - Offshore platform structures - Submarine components **Transportation:** - High-strength vehicle frames - Truck chassis components - Railway structural members - Bicycle and motorcycle frames **Industrial Applications:** - High-strength fasteners - Pressure vessel components - Machinery structural parts - Heavy-duty electrical conductors --- #### **8. Available Forms & Sizes** - Sheet: 0.8mm to 6.0mm thickness - Strip: 0.5mm to 3.0mm thickness - Plate: 6mm to 25mm thickness - Wire and rod: Various diameters - Custom profiles --- #### **9. International Standards** | Standard Organization | Designation | Specification | |----------------------|-------------|---------------| | Aluminum Association | AA 5056-H18 | AA-50 | | ASTM International | ASTM B209-5056H18 | ASTM B209 | | EN Standard | EN AW-5056-H18 | EN 573-3 | | ISO Standard | AlMg5-H18 | ISO 209 | | JIS Standard | A5056-H18 | JIS H4000 | | GB Standard | 5056-H18 | GB/T 3880 | --- #### **10. Corrosion Performance** - **Marine Environment**: Outstanding saltwater corrosion resistance - **Stress Corrosion**: Excellent resistance to stress corrosion cracking - **Atmospheric Corrosion**: Superior performance in harsh environments - **Galvanic Corrosion**: Requires isolation from dissimilar metals - **Pitting Resistance**: Excellent in chloride environments --- #### **11. Quality Assurance** - Certified mechanical properties to H18 requirements - Full chemical composition documentation - Microstructural examination - Surface quality verification - Dimensional accuracy certification - Third-party inspection available --- #### **12. Design Considerations** - **High Strength Utilization**: Maximum strength in strain-hardened condition - **Forming Limitations**: Restricted forming capability - **Welding Considerations**: Significant strength reduction in HAZ - **Temperature Limits**: Maximum service temperature 65°C - **Weight Advantage**: Significant weight savings versus steel --- #### **13. Comparative Properties** | Property | 5056-H18 | 5052-H38 | 6061-T6 | |----------|----------|----------|----------| | Tensile Strength (MPa) | 435-485 | 290-330 | 310-330 | | Yield Strength (MPa) | 405-455 | 250-280 | 275-295 | | Elongation (%) | 6-10 | 5-8 | 12-17 | | Marine Corrosion | Excellent | Very Good | Good | --- *Note: 5056-H18 aluminum alloy offers one of the highest strength levels among non-heat-treatable aluminum alloys, making it ideal for applications requiring maximum strength and excellent corrosion resistance. However, designers must consider its limited formability and special welding requirements. The alloy's exceptional performance in marine environments makes it a preferred choice for naval and offshore applications.*

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 1814 gallon liquid totes Special package is available on request.