5556 Aluminum alloy,Aluminum 5556 alloy,E FORU

# 5556 Aluminum Alloy Technical Datasheet ## Material Overview 5556 Aluminum Alloy is a high-strength, non-heat-treatable aluminum-magnesium alloy from the 5xxx series, specifically designed for applications requiring superior mechanical properties and excellent corrosion resistance in marine environments. This alloy offers enhanced strength characteristics and outstanding performance in welded structures, making it particularly suitable for naval, offshore, and structural applications where reliability and durability are paramount. --- ## 1. Chemical Composition (Weight %) | Element | Composition Range | |---------|-------------------| | Aluminum (Al) | Balance | | Magnesium (Mg) | 4.7 - 5.5 | | Manganese (Mn) | 0.50 - 1.0 | | Chromium (Cr) | 0.05 - 0.20 | | Iron (Fe) | ≤ 0.40 | | Silicon (Si) | ≤ 0.25 | | Copper (Cu) | ≤ 0.10 | | Zinc (Zn) | ≤ 0.25 | | Titanium (Ti) | ≤ 0.20 | | Other Elements (Each) | ≤ 0.05 | | Other Elements (Total) | ≤ 0.15 | --- ## 2. Physical Properties | Property | Value | |----------|-------| | Density | 2.66 g/cm³ | | Melting Range | 570 - 640 °C | | Electrical Conductivity | 28-32% IACS | | Thermal Conductivity | 117 - 127 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | 24.0 × 10⁻⁶/°C | | Modulus of Elasticity | 70 GPa | | Specific Heat Capacity | 900 J/kg·K | --- ## 3. Mechanical Properties | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |--------|------------------------|----------------------|----------------| | O | 290 - 340 | 140 - 180 | 18 - 22 | | H32 | 330 - 380 | 250 - 290 | 12 - 16 | | H34 | 350 - 400 | 270 - 310 | 10 - 14 | | H116 | 290 - 340 | 140 - 180 | 16 - 20 | --- ## 4. Technical Applications ### Primary Application Sectors: - **Naval & Marine Engineering** - Naval vessel structures - Ship hulls and superstructures - Submarine pressure hulls - Offshore platform components - **Aerospace & Defense** - Military vehicle armor - Aircraft structural components - Missile components - Defense equipment structures - **Pressure Vessels** - Cryogenic storage tanks - High-pressure containers - Chemical reactors - Industrial gas storage - **Structural Applications** - Bridge components - Heavy structural frameworks - Industrial machinery - Transportation equipment --- ## 5. International Standards Compliance | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5556 | | ASTM International | ASTM B209/B210 | | European Standards | EN AW-5556 | | International Standards | ISO 6361-2 | | Military Standards | MIL-DTL-46027 | --- ## 6. Material Characteristics ### Key Advantages: - High strength-to-weight ratio - Excellent corrosion resistance in marine environments - Superior stress corrosion cracking resistance - Good weldability with minimal strength loss - Excellent fatigue performance - Good cryogenic properties ### Special Features: - **Enhanced Strength** - High magnesium content for improved strength - Good strain hardening capability - Maintains strength at elevated temperatures - Consistent mechanical properties - **Corrosion Performance** - Outstanding seawater corrosion resistance - Excellent performance in marine atmospheres - Good resistance to chemical environments - Suitable for splash zone applications --- ## 7. Processing Characteristics ### Manufacturing Considerations: - **Welding Technology** - Excellent weldability using MIG and TIG methods - Recommended filler: 5356, 5183 - Minimal strength loss in heat-affected zone - Good weld metal mechanical properties - **Forming Operations** - Good cold working capability - Suitable for moderate forming operations - Predictable springback characteristics - Best formability in annealed condition - **Machining** - Good machinability with proper tools - Requires adequate cooling - Produces acceptable surface finish - Suitable for precision machining --- ## 8. Quality Assurance ### Testing & Certification: - Mechanical property testing - Chemical composition analysis - Corrosion resistance testing per ASTM standards - Fracture toughness evaluation - Fatigue testing capability - Mill test certificates per EN 10204 3.2 --- ## Technical Note 5556 Aluminum Alloy represents a premium high-strength aluminum-magnesium alloy designed for demanding applications in naval, marine, and defense industries. Its optimized chemical composition provides superior mechanical properties while maintaining excellent corrosion resistance. The alloy is particularly suitable for welded structures and components operating in aggressive environments where reliability and performance are critical requirements. Its combination of high strength, excellent corrosion resistance, and good manufacturing characteristics makes it a preferred choice for engineers designing critical components for severe service conditions. The alloy's proven performance in naval and marine applications 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 1920 gallon liquid totes Special package is available on request.