8021 Aluminum alloy,Aluminum 8021 alloy，E FORU

### **Aluminum 8021 Alloy Technical Datasheet** --- #### **1. Product Overview** **Aluminum 8021** is a specialized wrought aluminum alloy from the 8000 series, specifically developed for high-performance foil applications requiring excellent formability, superior surface quality, and enhanced mechanical properties. This non-heat-treatable alloy is particularly optimized for thin-gauge foil production and is widely used in advanced packaging, electrical, and industrial applications where consistent performance and reliability are critical. --- #### **2. Chemical Composition (Weight %)** | Element | Composition Range | Typical Value | |---------|-------------------|---------------| | Aluminum (Al) | Balance | ≥98.2% | | Iron (Fe) | 0.55 - 0.85% | 0.70% | | Silicon (Si) | 0.35 - 0.65% | 0.50% | | Copper (Cu) | ≤ 0.05% | 0.03% | | Manganese (Mn) | 0.08 - 0.20% | 0.14% | | Zinc (Zn) | ≤ 0.08% | 0.05% | | Magnesium (Mg) | ≤ 0.05% | 0.03% | | Titanium (Ti) | ≤ 0.06% | 0.03% | | Vanadium (V) | ≤ 0.05% | 0.03% | | Other Elements (each) | ≤ 0.03% | - | | Total Other Elements | ≤ 0.10% | - | **Key Composition Features:** - Optimized Fe/Si ratio for superior foil rolling characteristics - Enhanced purity for excellent surface quality - Controlled alloying elements for consistent mechanical properties - Specifically designed for thin-gauge applications - Superior performance in foil conversion processes --- #### **3. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | Density | 2.71 g/cm³ | 0.0979 lb/in³ | | Melting Range | 643-655°C | 1189-1211°F | | Thermal Conductivity | 205-215 W/m·K | - | | Electrical Conductivity | 53-57% IACS | - | | Modulus of Elasticity | 69 GPa | 10.0 × 10⁶ psi | | Coefficient of Thermal Expansion | 23.6 × 10⁻⁶/°C | 13.1 × 10⁻⁶/°F | | Specific Heat Capacity | 900 J/kg·K | - | | Electrical Resistivity | 30-33 nΩ·m | - | --- #### **4. Mechanical Properties** **Typical Properties in Various Tempers:** | Property | O Temper | H14 Temper | H16 Temper | H18 Temper | H19 Temper | |----------|----------|-------------|-------------|-------------|------------| | **Tensile Strength (MPa)** | 90-115 | 130-150 | 150-170 | 170-190 | 190-210 | | **Yield Strength (MPa)** | 35-55 | 110-130 | 130-150 | 150-170 | 170-190 | | **Elongation in 50 mm** | 28-38 | 10-14 | 7-10 | 4-7 | 3-5 | | **Tear Strength (N/mm)** | 130-160 | 190-230 | 230-270 | 270-310 | 310-350 | | **Puncture Resistance** | Very Good | Excellent | Superior | Premium | Maximum | **Foil-Specific Properties (6-20μm thickness):** - **Excellent Gauge Control** - **Minimal Pinhole Formation** - **Superior Surface Cleanliness** - **Consistent Tensile Properties** - **Excellent Fold Endurance** --- #### **5. International Standards** **Primary Specifications:** - **EN 573-3**: Aluminum and aluminum alloys - Chemical composition and form of wrought products - **ISO 209**: Wrought aluminum and aluminum alloys - Chemical composition and forms of products - **GB/T 3190**: Wrought aluminum and aluminum alloy chemical composition (China) **Foil-Specific Standards:** - **EN 602**: Aluminum and aluminum alloys - Wrought products for packaging - **ASTM B479**: Standard Specification for Annealed Aluminum Foil for Flexible Barrier Applications - **ASTM B928**: Standard Specification for High Magnesium Aluminum-Alloy Products **Quality & Safety Standards:** - **FDA CFR 21**: Food contact material compliance - **EU 10/2011**: Food contact material regulations - **ISO 22000**: Food safety management - **BRC-IOP** Global Standard for Packaging and Packaging Materials --- #### **6. Product Applications** **Advanced Packaging:** - Pharmaceutical blister packaging - Aseptic food packaging - High-barrier flexible packaging - Confectionery wrappers - Dairy product packaging **Electrical & Electronics:** - High-voltage capacitor foil - Transformer winding foil - Cable shielding foil - Lithium-ion battery foil - Electronic component packaging **Industrial Applications:** - Thermal insulation foil - Radiation barrier foil - Decorative foil applications - Label stock - Industrial laminate foil **Specialized Applications:** - Medical device packaging - Aerospace insulation foil - Automotive insulation - Construction barrier foil - Specialty container foil --- #### **7. Key Characteristics** **Foil Manufacturing Advantages:** - **Excellent Rolling Performance** down to 6μm thickness - **Superior Surface Quality** for printing and coating - **Minimal Pinhole Formation** - **Consistent Gauge Control** - **Excellent Annealing Response** **End-Use Performance:** - **Superior Barrier Properties** - **Excellent Forming Characteristics** - **Good Heat Sealability** - **Excellent Lacquer Adhesion** - **Consistent Mechanical Properties** --- #### **8. Processing Characteristics** **Foil Production:** - Excellent rolling performance at high speeds - Consistent tension control during processing - Uniform annealing characteristics - Superior surface finish quality - Easy slitting and rewinding operations **Converting Operations:** - Excellent printing surface characteristics - Superior coating adhesion properties - Easy laminating performance - Good punching and cutting properties - Excellent heat sealing performance **Quality Parameters:** - Consistent pinhole test results - Excellent optical density uniformity - Superior surface cleanliness - Reliable barrier performance - Consistent mechanical properties --- #### **9. Corrosion Resistance & Barrier Properties** **Performance Characteristics:** - **Excellent Atmospheric Corrosion** resistance - **Superior Moisture Barrier** properties - **Good Gas Barrier** characteristics - **Excellent Aroma Barrier** performance - **UV Light Protection** capability **Barrier Performance:** - **Water Vapor Transmission Rate**: Excellent - **Oxygen Transmission Rate**: Very Good - **Grease Resistance**: Excellent - **Chemical Resistance**: Good for packaging applications --- #### **10. Heat Treatment & Tempers** **Available Foil Tempers:** - **O (Annealed)**: Soft condition for flexible packaging - **H14, H16, H18**: Strain-hardened for rigid containers - **H19**: Extra hard for technical applications - **H22, H24**: Partially annealed for specific applications **Annealing Processes:** - Batch annealing: 300-350°C for 8-12 hours - Continuous annealing: 350-400°C for short durations - Special annealing for optimal surface quality --- #### **11. Quality Assurance** **Specialized Testing Protocol:** - Pinhole testing per ASTM B926 - Water vapor transmission rate testing - Oxygen transmission rate measurement - Surface cleanliness inspection - Thickness uniformity verification - Mechanical property consistency testing **Certification Requirements:** - Food contact compliance certification - Pharmaceutical grade qualifications - Mill test certificates with foil-specific data - Comprehensive traceability documentation - Regular quality system audits --- #### **12. Comparison with Similar Foil Alloys** | Property | 8021-H19 | 8011-H19 | 1235-H19 | |----------|-----------|-----------|-----------| | Tensile Strength (MPa) | 190-210 | 180-200 | 170-190 | | Elongation (%) | 3-5 | 2-4 | 1-3 | | Pinhole Count | Very Low | Low | Very Low | | Surface Quality | Premium | Excellent | Very Good | | Typical Applications | Pharma packaging | Food packaging | Capacitor foil | --- #### **Conclusion** Aluminum 8021 alloy represents a premium-grade material solution specifically engineered for high-performance foil applications where superior quality, consistent performance, and reliable barrier properties are essential. Its optimized chemical composition and specialized manufacturing process ensure excellent rolling characteristics, minimal defect rates, and consistent performance in both production and converting operations. The alloy's exceptional surface quality, combined with its reliable mechanical properties and superior barrier performance, makes it the material of choice for demanding applications in pharmaceutical packaging, high-barrier food packaging, and specialized technical foil products. The consistent quality and enhanced performance characteristics of 8021 alloy provide manufacturers with reliable material solutions for applications where product protection, shelf-life extension, and consumer safety are paramount considerations.

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 2239 gallon liquid totes Special package is available on request.