5449A Aluminum alloy,Aluminum 5449A alloy,E FORU

# 5449A Aluminum Alloy Technical Datasheet ## Material Overview 5449A Aluminum Alloy is an enhanced version of the standard 5449 alloy, featuring tighter compositional controls and improved manufacturing consistency for critical applications. As a high-strength Al-Mg alloy from the 5xxx series, it offers superior welding performance, excellent marine corrosion resistance, and enhanced mechanical properties. The "A" designation indicates improved quality assurance standards, making it suitable for demanding aerospace, marine, and structural applications. --- ## 1. Chemical Composition (Weight %) | Element | Composition Range | Notes | |---------|-------------------|-------| | Aluminum (Al) | Balance | High purity base | | Magnesium (Mg) | 5.0 - 5.6 | Tighter control | | Manganese (Mn) | 0.20 - 0.40 | Optimized range | | Zirconium (Zr) | 0.08 - 0.15 | Grain refinement | | Chromium (Cr) | 0.10 - 0.20 | Controlled addition | | Iron (Fe) | ≤ 0.20 | Enhanced purity | | Silicon (Si) | ≤ 0.15 | Reduced limit | | Copper (Cu) | ≤ 0.03 | Ultra-low | | Zinc (Zn) | ≤ 0.10 | Reduced | | Titanium (Ti) | 0.05 - 0.12 | Enhanced grain control | | Other Elements (Each) | ≤ 0.03 | Tighter control | | Other Elements (Total) | ≤ 0.10 | Enhanced purity | --- ## 2. Physical Properties | Property | Value | Standard | |----------|-------|----------| | Density | 2.66 g/cm³ | ASTM B193 | | Melting Range | 578 - 638 °C | - | | Electrical Conductivity | 29-33% IACS | ASTM E1004 | | Thermal Conductivity | 118 - 128 W/m·K | ASTM E1461 | | Coefficient of Thermal Expansion | 23.9 × 10⁻⁶/°C | ASTM E228 | | Modulus of Elasticity | 70 GPa | ASTM E111 | | Specific Heat Capacity | 900 J/kg·K | - | --- ## 3. Mechanical Properties | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Fracture Toughness (MPa√m) | |--------|------------------------|----------------------|----------------|---------------------------| | O | 300 - 350 | 140 - 190 | 20 - 24 | ≥ 35 | | H32 | 350 - 400 | 270 - 320 | 14 - 18 | ≥ 30 | | H34 | 370 - 420 | 290 - 340 | 12 - 16 | ≥ 28 | | H116 | 300 - 350 | 140 - 190 | 18 - 22 | ≥ 32 | --- ## 4. Technical Applications ### Critical Application Sectors: - **Aerospace & Aviation** - Aircraft structural components - Space vehicle fuel tanks - Helicopter airframe structures - Aviation structural reinforcements - **Marine & Naval** - Naval vessel hull structures - Submarine pressure hulls - High-speed marine craft - Offshore platform critical components - **Defense & Military** - Military vehicle armor systems - Defense equipment structures - Missile launch components - Military bridge systems - **Energy Sector** - LNG storage and transport - Hydrogen energy systems - Nuclear power components - High-pressure energy equipment --- ## 5. International Standards Compliance | Standard Organization | Designation | Specification | |----------------------|-------------|---------------| | European Standards | EN AW-5449A | EN 485-2 | | ASTM International | ASTM B928 | Premium Marine Grade | | ISO Standards | ISO 6361-2 | AlMg5.3Mn0.3Zr | | Aerospace Standards | AMS 4356 | Aerospace Grade | | Naval Standards | MIL-DTL-46027 | Special Grade | --- ## 6. Material Characteristics ### Enhanced Advantages: - Superior and consistent welding performance - Enhanced marine corrosion resistance - Improved fracture toughness - Better stress corrosion cracking resistance - Consistent batch-to-batch properties - Superior cryogenic performance ### Special Features: - **Microstructural Control** - Fine grain structure with zirconium addition - Controlled recrystallization behavior - Enhanced mechanical properties - Improved damage tolerance - **Corrosion Performance** - Exceptional pitting corrosion resistance - Superior intergranular corrosion resistance - Excellent performance in chloride environments - Outstanding long-term durability --- ## 7. Processing Characteristics ### Advanced Manufacturing: - **Welding Excellence** - Premium weld metal properties - Minimal heat-affected zone softening - Excellent crack resistance - Superior quality weld appearance - **Forming Technology** - Controlled forming characteristics - Predictable springback behavior - Good stretch forming capability - Suitable for complex geometries - **Quality Control** - Advanced ultrasonic testing compatibility - Enhanced radiographic inspection - Superior surface quality standards - Consistent mechanical properties --- ## 8. Quality Assurance ### Premium Testing Protocol: - Enhanced chemical analysis with reduced tolerances - Comprehensive mechanical testing at multiple temperatures - Enhanced corrosion testing per ASTM G67 and G44 - Fracture toughness testing per ASTM E399 - Weld procedure qualification with enhanced requirements - Third-party certification mandatory ### Certification Standards: - EN 10204 3.2 Certification with extended scope - Full traceability from raw material to final product - Special aerospace and military qualifications - Enhanced documentation and reporting --- ## Technical Note 5449A Aluminum Alloy represents the premium grade in its category, specifically designed for applications where superior and consistent performance is critical. The enhanced chemical controls and manufacturing processes ensure exceptional performance in demanding aerospace, marine, defense, and energy applications. Its improved consistency and reliability make it the preferred choice for safety-critical and long-life cycle applications where material performance cannot be compromised. The alloy's proven performance in extreme service conditions has established it as a benchmark material for advanced engineering applications requiring the ultimate in reliability and durability.

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 1898 gallon liquid totes Special package is available on request.