7005-O Aluminum alloy,Aluminum 7005-O alloy，E FORU

### **Aluminum 7005-O Alloy (EN AW-7005-O) - Product Introduction** **Aluminum 7005-O** is the annealed temper of the 7005 aluminum-zinc-magnesium alloy, characterized by its maximum softness and ductility. The "O" temper designation indicates that the material has been fully annealed to achieve the softest possible condition, making it ideal for applications requiring severe forming, deep drawing, or complex bending operations while maintaining excellent potential for subsequent heat treatment to high strength levels. --- #### **1. Chemical Composition** The chemical composition is balanced for optimal formability and subsequent age-hardening response: | Element | Content (%) (Typical) | Standard Range (EN 573-3) | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 4.0 - 5.0 | 4.0 - 5.0 | | **Magnesium (Mg)** | 1.0 - 1.8 | 1.0 - 1.8 | | **Manganese (Mn)** | 0.20 - 0.50 | 0.20 - 0.50 | | **Chromium (Cr)** | 0.06 - 0.20 | 0.06 - 0.20 | | **Zirconium (Zr)** | 0.08 - 0.15 | 0.08 - 0.15 | | **Copper (Cu)** | ≤ 0.10 | ≤ 0.10 | | **Iron (Fe)** | ≤ 0.30 | ≤ 0.30 | | **Silicon (Si)** | ≤ 0.30 | ≤ 0.30 | | **Titanium (Ti)** | ≤ 0.05 | ≤ 0.05 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** Aluminum 7005-O exhibits typical physical properties in annealed condition: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.78 g/cm³ | 0.100 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 40-44 % IACS | 40-44 % IACS | | **Thermal Conductivity** | 160-175 W/m·K | 1110-1215 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** The O temper provides maximum ductility with minimum strength: | Property | Metric Value | Imperial Value | |---|---|---| | **Tensile Strength, Ultimate** | 180-220 MPa | 26,100-31,900 psi | | **Tensile Strength, Yield (0.2% Offset)** | 80-120 MPa | 11,600-17,400 psi | | **Elongation in 50mm** | 18-22% | 18-22% | | **Hardness (Brinell)** | 50-60 HB | 50-60 HB | | **Shear Strength** | 120 MPa | 17,400 psi | | **Fatigue Strength** | 80 MPa | 11,600 psi | | **Poisson's Ratio** | 0.33 | 0.33 | --- #### **4. International Standards** Aluminum 7005-O conforms to the following international standards: * **European Standard (EN):** **EN AW-7005** (Material Number 3.3197) * **ISO:** **AlZn4.5Mg1.5** under ISO 209 * **JIS:** **JIS H 4040** (A7005) * **EN 755:** Aluminum and aluminum alloy extruded rod/bar, tube and profiles * **ASTM:** **ASTM B221** for Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes * **GB/T:** **GB/T 3190** (Chinese National Standard) --- #### **5. Product Applications** Aluminum 7005-O is specifically used for applications requiring severe forming: * **Complex Formed Components:** Parts requiring deep drawing or severe bending * **Bicycle Frame Tubes:** Tubing requiring complex shaping before heat treatment * **Transportation Components:** Vehicle parts needing extensive forming * **Sports Equipment:** Components requiring complex shaping operations * **Marine Hardware:** Boat components requiring forming before strengthening * **Prototype Development:** Parts requiring easy formability for prototyping * **Architectural Elements:** Complex-shaped structural components * **General Fabrication:** Parts requiring extensive forming and shaping --- #### **6. Key Advantages & Characteristics** * **Maximum Formability:** Excellent for severe bending and deep drawing operations * **Superior Ductility:** Highest elongation characteristics in the 7005 alloy system * **Excellent Weldability:** Can be readily welded in annealed condition * **Annealing Stability:** Consistent properties throughout the material * **Workability:** Easy to cut, form, and shape with minimal springback * **Heat Treatable:** Can be subsequently heat treated to T6 or T53 tempers * **Good Surface Quality:** Suitable for various surface treatments after forming * **Age-Hardening Potential:** Can achieve strengths over 350 MPa after heat treatment **Annealing Process:** - Annealing temperature: 415-430°C (780-805°F) - Soaking time: 2-3 hours at temperature - Controlled cooling rate (furnace cooling preferred) - Uniform properties throughout cross-section **Forming Characteristics:** - Minimum bend radius: 0-1T (depending on thickness and orientation) - Excellent for deep drawing operations - Low springback characteristics - Suitable for complex forming and stamping operations **Subsequent Heat Treatment:** - Can be solution heat treated and aged to T6 temper - Typical aging temperature: 120-140°C (250-285°F) - Good response to artificial aging - Can achieve high strength properties after forming --- **Processing Recommendations:** - Store in dry conditions to prevent surface contamination - Handle with care to avoid surface scratches and damage - Complete major forming operations before heat treatment - Use proper tooling and lubrication to avoid galling during forming - Clean surfaces thoroughly before subsequent heat treatment **Quality Assurance:** - Consistent mechanical properties throughout material - Good surface quality with minimal imperfections - Reliable performance in forming operations - Suitable for quality-critical fabrication processes --- **Conclusion:** Aluminum 7005-O offers the ultimate in formability and workability within the 7005 alloy system, making it the preferred choice for applications requiring severe forming operations before final heat treatment. Its ability to be subsequently heat treated to high strength levels provides manufacturers with exceptional flexibility in production processes. The alloy's combination of maximum ductility, good weldability, and excellent age-hardening potential makes it invaluable for complex formed components across transportation, sports equipment, and general fabrication applications. For manufacturers requiring maximum formability with the option for subsequent strengthening to high strength levels, Aluminum 7005-O delivers unparalleled processing flexibility and performance potential.

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 2100 gallon liquid totes Special package is available on request.