7021-T62 Aluminum alloy,Aluminum 7021-T62 alloy，E FORU

### **Aluminum 7021-T62 Alloy (EN AW-7021) - Product Introduction** **Aluminum 7021-T62** is a high-strength aluminum-zinc-magnesium alloy that has been solution heat-treated, cold worked, and artificially aged to achieve specific mechanical properties. The T62 temper designation indicates a controlled combination of cold working and aging that provides enhanced strength characteristics while maintaining good corrosion resistance and manufacturability. --- #### **1. Chemical Composition** The chemical composition is optimized for high strength and good corrosion resistance: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 5.0 - 6.0 | 5.0 - 6.0 | | **Magnesium (Mg)** | 1.8 - 2.4 | 1.8 - 2.4 | | **Copper (Cu)** | 0.8 - 1.5 | 0.8 - 1.5 | | **Zirconium (Zr)** | 0.08 - 0.15 | 0.08 - 0.15 | | **Manganese (Mn)** | 0.05 - 0.15 | 0.05 - 0.15 | | **Chromium (Cr)** | 0.08 - 0.16 | 0.08 - 0.16 | | **Iron (Fe)** | ≤ 0.20 | ≤ 0.20 | | **Silicon (Si)** | ≤ 0.15 | ≤ 0.15 | | **Titanium (Ti)** | ≤ 0.05 | ≤ 0.05 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** Aluminum 7021-T62 exhibits excellent physical properties: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.80 g/cm³ | 0.101 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 36-40 % IACS | 36-40 % IACS | | **Thermal Conductivity** | 145-160 W/m·K | 1005-1110 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.7 × 10⁻⁶/K | 13.2 × 10⁻⁶/°F | | **Modulus of Elasticity** | 70 GPa | 10,150 ksi | | **Shear Modulus** | 26.5 GPa | 3,840 ksi | --- #### **3. Mechanical Properties** **7021-T62 Mechanical Properties:** | Property | Metric Value | Imperial Value | |---|---|---| | **Tensile Strength, Ultimate** | 420-470 MPa | 60,900-68,200 psi | | **Tensile Strength, Yield (0.2%)** | 360-410 MPa | 52,200-59,500 psi | | **Elongation in 50mm** | 10-14% | 10-14% | | **Hardness (Brinell)** | 120-130 HB | 120-130 HB | | **Shear Strength** | 250 MPa | 36,300 psi | | **Fatigue Strength** | 140 MPa | 20,300 psi | | **Fracture Toughness** | 30-35 MPa·√m | 27-32 ksi·√in | --- #### **4. International Standards** Aluminum 7021-T62 conforms to these international standards: * **EN:** **EN AW-7021** (European Standard) * **ASTM:** **ASTM B221**, **ASTM B241** * **ISO:** **AlZn5Mg2Cu** under ISO 209 * **JIS:** **JIS H 4040** * **GB/T:** **GB/T 3190** * **AMS:** **AMS 4155** (Aerospace Material Specification) --- #### **5. Product Applications** Aluminum 7021-T62 is used in high-strength applications: * **Aerospace Components:** Aircraft structural members, brackets * **Military Equipment:** Defense system components, military hardware * **Transportation:** Truck frames, trailer structural components * **Marine Applications:** Boat structural components, marine hardware * **Industrial Machinery:** High-stress machinery components * **Automotive:** High-performance vehicle components * **Sports Equipment:** High-strength bicycle frames, sports gear * **Structural Components:** High-load structural applications --- #### **6. Key Advantages & Characteristics** * **Enhanced Strength Properties:** Improved mechanical properties through cold working * **Good Corrosion Resistance:** Maintains adequate corrosion resistance * **Excellent Fatigue Performance:** Good resistance to cyclic loading * **Controlled Toughness:** Balanced strength and toughness characteristics * **Heat Treatable:** Responsive to artificial aging treatments * **Machinability:** Good machining characteristics in T62 condition * **Weight Efficiency:** High strength-to-weight ratio * **Manufacturing Flexibility:** Suitable for various fabrication methods **Heat Treatment Process:** - Solution Treatment: 465-480°C (870-900°F) - Cold Working: Controlled amount of cold deformation - Artificial Aging: 120-140°C (250-285°F) for specific duration - Final properties determined by combined effects **T62 Temper Characteristics:** - Combines benefits of cold working and artificial aging - Provides specific mechanical property combination - Suitable for applications requiring controlled strength-toughness balance - Offers predictable performance characteristics **Manufacturing Characteristics:** - Good for precision manufacturing - Suitable for various forming operations - Can be machined using conventional methods - Weldable using appropriate procedures --- **Quality Assurance:** - Strict mechanical property controls - Chemical composition verification - Dimensional accuracy requirements - Comprehensive testing and certification **Processing Recommendations:** - Use proper tooling for machining operations - Follow recommended cold working procedures - Implement controlled aging processes - Maintain consistent processing parameters --- **Conclusion:** Aluminum 7021-T62 offers a specific combination of mechanical properties achieved through controlled cold working and aging processes. This temper provides enhanced strength characteristics while maintaining good overall performance, making it suitable for applications requiring specific property combinations. The alloy's balanced characteristics and reliable performance establish it as a valuable material for aerospace, military, and high-performance engineering applications where controlled mechanical properties and manufacturing consistency are essential.

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 2117 gallon liquid totes Special package is available on request.