5457-H28; 5457-H38 Aluminum alloy,Aluminum 5457-H28; 5457-H38 alloy,E FORU

# 5457-H28 / 5457-H38 Aluminum Alloy Technical Datasheet ## Material Overview 5457-H28 and 5457-H38 are high-strength strain-hardened tempers of the 5457 aluminum-magnesium alloy, designed for applications requiring superior mechanical properties while maintaining excellent surface quality. The H28 temper approaches full-hard condition, while H38 represents the full-hard temper, both offering enhanced strength for demanding automotive, architectural, and decorative applications where durability and premium appearance are critical. --- ## 1. Chemical Composition (Weight %) | Element | Composition Range | |---------|-------------------| | Aluminum (Al) | Balance | | Magnesium (Mg) | 0.8 - 1.2 | | Manganese (Mn) | 0.05 - 0.20 | | Chromium (Cr) | 0.10 - 0.25 | | Iron (Fe) | ≤ 0.10 | | Silicon (Si) | ≤ 0.08 | | Copper (Cu) | ≤ 0.05 | | Zinc (Zn) | ≤ 0.05 | | Titanium (Ti) | ≤ 0.03 | | Other Elements (Each) | ≤ 0.03 | | Other Elements (Total) | ≤ 0.10 | --- ## 2. Physical Properties | Property | Value | |----------|-------| | Density | 2.70 g/cm³ | | Melting Range | 640 - 655 °C | | Electrical Conductivity | 36-40% IACS | | Thermal Conductivity | 140 - 150 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 | 5457-H28 | 5457-H38 | |----------|-----------|-----------| | Tensile Strength (MPa) | 220 - 260 | 240 - 280 | | Yield Strength (MPa) | 180 - 220 | 200 - 240 | | Elongation (%) | 6 - 10 | 4 - 8 | | Hardness (Brinell) | 65 - 75 | 70 - 80 | | Shear Strength (MPa) | 130 - 160 | 140 - 170 | | Fatigue Strength (MPa) | 95 - 115 | 100 - 120 | --- ## 4. Technical Applications ### 5457-H28 Applications: - Automotive exterior trim - Heavy-duty decorative moldings - Architectural structural trim - Premium appliance components - Quality consumer products ### 5457-H38 Applications: - High-strength automotive trim - Architectural structural elements - Premium wheel covers - Heavy-duty decorative hardware - Luxury consumer goods --- ## 5. International Standards Compliance | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5457-H28/H38 | | ASTM International | ASTM B209-5457 | | European Standards | EN AW-5457 H28/H38 | | Japanese Standards | JIS A5457 H28/H38 | | International Standards | ISO 6361-2 | --- ## 6. Material Characteristics ### Common Advantages: - High strength for decorative applications - Excellent surface finish quality - Superior anodizing characteristics - Good corrosion resistance - Excellent spring properties - Bright, reflective surface capability ### Temper-Specific Features: **5457-H28:** - High strength approaching full-hard condition - Good durability with moderate formability - Suitable for structural decorative applications - Excellent balance of strength and appearance **5457-H38:** - Maximum strength in 5457 alloy system - Superior spring characteristics - Excellent dent resistance - Best durability for demanding applications --- ## 7. Processing Characteristics ### Manufacturing Considerations: - **Forming Operations** - H28: Limited formability, suitable for light bending - H38: Very limited formability, minimal bending capability - Both require careful handling to prevent cracking - Significant springback characteristics - **Anodizing Performance** - Excellent for bright anodizing - Uniform oxide layer formation - Good color consistency - Suitable for hard anodizing processes - **Joining Technology** - Good weldability with proper techniques - Recommended filler: 4043, 5356 - Suitable for adhesive bonding - Good for mechanical fastening - **Machining** - Good machinability with sharp tools - Produces excellent surface finish - Suitable for precision machining - Requires adequate cooling --- ## 8. Quality Assurance ### Testing & Certification: - Mechanical property testing - Chemical composition analysis - Surface quality inspection - Anodizing quality tests - Corrosion resistance evaluation - Mill test certificates per EN 10204 3.1 ### Special Quality Requirements: - Surface reflectivity standards - Color consistency controls - Surface defect limitations - Mechanical property verification --- ## Technical Note 5457-H28 and 5457-H38 Aluminum Alloys represent the high-strength variants within the 5457 alloy system, providing superior mechanical properties while maintaining the exceptional surface quality and anodizing characteristics that make this alloy valuable for premium decorative applications. The H28 temper offers high strength suitable for most structural decorative applications, while the H38 temper provides maximum strength for the most demanding applications where durability and resistance to deformation are critical. Both tempers maintain the ability to achieve brilliant, reflective surfaces through mechanical polishing and anodizing processes, making them ideal for automotive exterior trim, architectural elements, and high-end consumer products where both aesthetic excellence and mechanical performance are essential requirements.

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 1915 gallon liquid totes Special package is available on request.