5657-O Aluminum alloy,Aluminum 5657-O alloy,E FORU

# 5657-O Aluminum Alloy Technical Datasheet ## Material Overview 5657-O is the annealed temper of the 5657 aluminum-magnesium alloy, offering maximum ductility and superior formability for severe forming operations. In the "O" (annealed) condition, this non-heat-treatable alloy achieves its softest state, making it ideal for complex fabrication processes and deep drawing applications where exceptional surface quality and bright finishing characteristics are required. --- ## 1. Chemical Composition (Weight %) | Element | Composition Range | |---------|-------------------| | Aluminum (Al) | Balance | | Magnesium (Mg) | 0.6 - 1.0 | | Manganese (Mn) | 0.03 - 0.12 | | Chromium (Cr) | 0.10 - 0.20 | | Iron (Fe) | ≤ 0.08 | | Silicon (Si) | ≤ 0.06 | | Copper (Cu) | ≤ 0.03 | | Zinc (Zn) | ≤ 0.03 | | Titanium (Ti) | ≤ 0.02 | | Other Elements (Each) | ≤ 0.02 | | Other Elements (Total) | ≤ 0.08 | --- ## 2. Physical Properties | Property | Value | |----------|-------| | Density | 2.70 g/cm³ | | Melting Range | 643 - 654 °C | | Electrical Conductivity | 41-45% IACS | | Thermal Conductivity | 150 - 160 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | 23.6 × 10⁻⁶/°C | | Modulus of Elasticity | 69 GPa | | Specific Heat Capacity | 900 J/kg·K | --- ## 3. Mechanical Properties | Property | Typical Value | |----------|---------------| | Tensile Strength | 110 - 150 MPa | | Yield Strength (0.2% Offset) | 40 - 70 MPa | | Elongation (50mm) | 26 - 32% | | Hardness (Brinell) | 30 - 40 HB | | Shear Strength | 75 - 105 MPa | | Fatigue Strength | 60 - 80 MPa | --- ## 4. Technical Applications ### Primary Application Sectors: - **Deep Drawing & Stamping** - Complex deep-drawn decorative components - Severe forming applications requiring high ductility - Intricate stamped bright trim parts - Multi-stage formed components - **Automotive Bright Trim** - Automotive exterior brightwork formations - Complex trim component fabrication - Decorative automotive part manufacturing - Premium vehicle trim components - **Architectural Elements** - Decorative building panel formations - Architectural trim component fabrication - Interior design element manufacturing - Custom decorative hardware production - **Consumer Products** - Appliance decorative component forming - Electronic enclosure fabrication - Premium consumer goods manufacturing - Luxury product component production --- ## 5. International Standards Compliance | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5657-O | | ASTM International | ASTM B209-5657 O | | European Standards | EN AW-5657 O | | Japanese Standards | JIS A5657 O | | International Standards | ISO 6361-2 | --- ## 6. Material Characteristics ### Key Advantages: - Maximum ductility and formability - Superior surface finish quality - Excellent bright anodizing characteristics - Good corrosion resistance - Consistent mechanical properties - Ideal for complex forming operations ### Special Features: - **Surface Quality** - Exceptional brightness after polishing - Excellent response to electrochemical polishing - Uniform surface appearance - Consistent reflective properties - **Forming Characteristics** - Exceptional deep drawing performance - Minimal springback - Suitable for severe bending operations - Excellent stretch forming capability --- ## 7. Processing Characteristics ### Manufacturing Considerations: - **Surface Treatment** - Excellent response to mechanical polishing - Ideal for electrochemical polishing - Excellent for bright dipping processes - Consistent results in anodizing - **Forming Operations** - Superior deep drawing capability - Excellent bending characteristics - Minimal springback - Suitable for complex stamping operations - **Anodizing Performance** - Superior bright anodizing capability - Excellent clarity in clear anodizing - Good color consistency in dyeing - Uniform coating thickness distribution - **Joining Technology** - Good weldability using TIG and MIG methods - Recommended filler: 4043 - Suitable for adhesive bonding - Good for mechanical fastening --- ## 8. Quality Assurance ### Testing & Certification: - Mechanical property verification - Chemical composition analysis - Surface quality inspection - Anodizing quality tests - Reflectivity measurement - Corrosion resistance evaluation ### Special Quality Requirements: - Surface cleanliness standards - Reflectivity specifications - Color consistency controls - Surface defect limitations --- ## Technical Note 5657-O Aluminum Alloy provides the ultimate in formability and surface quality within the 5657 alloy system, making it the preferred choice for applications requiring severe forming operations combined with premium aesthetic appearance. The fully annealed condition ensures maximum ductility while maintaining the exceptional surface characteristics that make this alloy ideal for high-end decorative applications. This material serves as an ideal starting point for manufacturing processes involving complex forming operations, with the capability to achieve brilliant, mirror-like surfaces through subsequent polishing and anodizing processes. The alloy's ability to undergo significant deformation without compromising surface quality makes it particularly valuable for automotive bright trim, architectural elements, and consumer products where both complex geometries and visual excellence are critical requirements. The material's consistent performance in various finishing processes ensures high-quality end products with exceptional aesthetic appeal.

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 1935 gallon liquid totes Special package is available on request.