5254-H38 Aluminum alloy,Aluminum 5254-H38 alloy,E FORU

### **5254-H38 Aluminum Alloy Technical Datasheet** **Material Overview** 5254-H38 is the full-hard temper variant of the 5254 aluminum-magnesium alloy, offering the highest strength characteristics achievable in this alloy system while maintaining good corrosion resistance. The H38 temper indicates that the material has been severely strain-hardened to achieve maximum strength levels, then stabilized to ensure property consistency. This temper provides superior mechanical performance for applications requiring the ultimate strength in marine, offshore, and pressure vessel applications. --- ### **1. Chemical Composition (Weight %)** | Element | Composition Range | |---------|-------------------| | Aluminum (Al) | Balance | | Magnesium (Mg) | 3.1 - 3.9 | | Manganese (Mn) | ≤ 0.50 | | Chromium (Cr) | 0.15 - 0.35 | | Iron (Fe) | ≤ 0.40 | | Silicon (Si) | ≤ 0.25 | | Copper (Cu) | ≤ 0.05 | | Zinc (Zn) | ≤ 0.20 | | Titanium (Ti) | ≤ 0.05 | | Other Elements (Each) | ≤ 0.05 | | Other Elements (Total) | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value | |----------|-------| | Density | 2.66 g/cm³ | | Melting Range | 590 - 645 °C | | Electrical Conductivity | 28-32% IACS | | Thermal Conductivity | 115 - 125 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | 23.7 × 10⁻⁶/°C | | Modulus of Elasticity | 70 GPa | | Specific Heat Capacity | 900 J/kg·K | --- ### **3. Mechanical Properties** | Property | Typical Value | Standard Minimum | |----------|---------------|------------------| | Tensile Strength | 330 - 380 MPa | 310 MPa | | Yield Strength (0.2% Offset) | 260 - 300 MPa | 255 MPa | | Elongation (50mm) | 6 - 10% | 4% | | Hardness (Brinell) | 90 - 100 HB | - | | Shear Strength | 190 - 220 MPa | - | | Fatigue Strength | 135 - 155 MPa | - | --- ### **4. Technical Applications** **Primary Application Sectors:** - **Marine & Offshore Engineering** - High-stress hull components - Structural reinforcement members - Offshore platform critical components - Submarine pressure hull elements - **Pressure Vessel Systems** - High-pressure container construction - Compressed gas storage vessels - Cryogenic tank structural parts - Chemical reactor components - **Heavy Transportation** - Truck frame reinforcements - Trailer structural components - Railway heavy-duty members - Marine transport structural elements - **Industrial Equipment** - Heavy machinery structural parts - High-stress support frames - Equipment reinforcement members - Industrial structural applications --- ### **5. International Standards Compliance** | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5254-H38 | | ASTM International | ASTM B209-5254 H38 | | European Standards | EN AW-5254A H38 | | Japanese Standards | JIS A5254 H38 | | International Standards | ISO 6361-2 | --- ### **6. Material Characteristics** **Key Advantages:** - Maximum strength in 5254 alloy system - Excellent marine corrosion resistance - Good stress corrosion cracking resistance - Superior mechanical properties - Maintains adequate corrosion performance - Suitable for high-stress applications **Special Features:** - **Corrosion Performance** - Outstanding seawater corrosion resistance - Excellent performance in marine environments - Good chemical resistance - Suitable for aggressive service conditions - **Mechanical Performance** - Highest strength available in 5254 alloy - Good fatigue resistance - Adequate toughness for structural applications - Stable properties under high stress --- ### **7. Processing Characteristics** **Manufacturing Considerations:** - **Forming Operations** - Very limited formability - Suitable for very light bending only - Requires specialized tooling and techniques - Significant springback characteristics - **Welding Technology** - Requires careful welding procedures - Recommended filler alloys: 5356, 5183 - Pre-heating essential for thick sections - Post-weld heat treatment recommended - **Machining** - Good machinability with sharp, proper tools - Requires adequate cooling and lubrication - Produces good surface finish - Suitable for precision machining --- ### **8. Quality Assurance** **Testing & Certification:** - Comprehensive mechanical testing - Chemical composition analysis - Corrosion resistance evaluation - Non-destructive testing - Dimensional verification - Mill test certificates per EN 10204 3.1 --- ### **9. Special Considerations** **Design Guidelines:** - Ideal for maximum strength applications - Suitable for critical marine structures - Excellent for high-pressure vessels - Recommended for heavy-load applications **Service Conditions:** - Maintains properties at elevated temperatures - Good cryogenic service performance - Suitable for high-stress applications - Resistant to harsh environmental conditions --- **Technical Note:** 5254-H38 Aluminum Alloy represents the ultimate in strength performance within the 5254 alloy system, providing maximum mechanical properties while maintaining the excellent corrosion resistance characteristics that make this alloy valuable for marine and industrial applications. The full-hard H38 temper offers the highest strength achievable through strain hardening, making it particularly suitable for applications where structural requirements demand the utmost mechanical performance while still requiring good corrosion resistance in aggressive environments.

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 1880 gallon liquid totes Special package is available on request.