7005-W Aluminum alloy,Aluminum 7005-W alloy，E FORU

### **Aluminum 7005-W Alloy (EN AW-7005) - Product Introduction** **Aluminum 7005-W** is a heat-treatable aluminum-zinc-magnesium alloy in the solution heat-treated (as-quenched) condition. The "W" temper designation indicates an unstable temper where the material has been solution heat treated and quenched, then naturally aged at room temperature. This condition is characterized by its metastable state, with properties that change significantly with time at room temperature due to natural aging. --- #### **1. Chemical Composition** The chemical composition is balanced for optimal 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-W exhibits typical physical properties in solution-treated 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** | 42-46 % IACS | 42-46 % IACS | | **Thermal Conductivity** | 165-180 W/m·K | 1145-1250 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** **Properties Immediately After Quenching (W Temper):** - Tensile Strength: 220-260 MPa (31,900-37,700 psi) - Yield Strength: 110-150 MPa (16,000-21,800 psi) - Elongation: 16-20% - Hardness: 65-75 HB **Properties After 30 Days Natural Aging (Transition to T4):** - Tensile Strength: 280-320 MPa (40,600-46,400 psi) - Yield Strength: 170-210 MPa (24,700-30,500 psi) - Elongation: 14-18% - Hardness: 80-90 HB --- #### **4. International Standards** Aluminum 7005-W conforms to these international standards: * **European Standard (EN):** **EN AW-7005** (Material Number 3.3197) * **ISO:** **AlZn4.5Mg1.5** under ISO 209 * **ASTM:** **ASTM B221** for Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes * **JIS:** **JIS H 4040** (A7005) * **EN 755:** Aluminum and aluminum alloy extruded rod/bar, tube and profiles * **GB/T:** **GB/T 3190** (Chinese National Standard) --- #### **5. Product Applications** Aluminum 7005-W is primarily used as an intermediate processing condition: * **Forming Operations:** Components requiring forming after solution treatment * **Welding Applications:** Parts to be welded in soft condition * **Age-Forming Processes:** Aerospace components using aging during forming * **Prototype Development:** Experimental components for process development * **Research Applications:** Materials science studies on aging behavior * **Temporary Structures:** Short-term applications using W condition properties * **Manufacturing Intermediate:** Processing stage before final aging --- #### **6. Key Advantages & Characteristics** * **Maximum Formability:** Softest condition for post-solution treatment forming * **Natural Aging Response:** Properties evolve significantly with time * **Excellent Weldability:** Ideal condition for welding operations * **Age-Forming Capability:** Can be formed during natural aging process * **Metastable State:** Properties change predictably with time * **Good Machinability:** Easy to machine in soft condition * **Heat Treatable:** Can be artificially aged to T6 or other tempers **Natural Aging Characteristics:** - Rapid property changes in first 24-48 hours - Significant strengthening over 30-day period - Properties stabilize after approximately 30 days - Transition from W to T4 temper occurs naturally **Processing Window:** - Typical working time: 2-6 hours after quenching - Forming should be completed within 4 hours - Welding should be performed within 2 hours - Artificial aging can be applied at any time **Heat Treatment Process:** - Solution Treatment: 465-480°C (870-900°F) - Quenching: Rapid water quenching (critical) - Natural Aging: Room temperature aging - Artificial Aging: Optional after forming/welding --- **Quality Assurance:** - Strict control of solution treatment parameters - Monitoring of quenching rate and temperature - Documentation of aging time and conditions - Mechanical property verification at specified times **Storage and Handling:** - Store at controlled room temperature - Document time since quenching - Protect from contamination during handling - Use within specified time windows for critical operations --- **Conclusion:** Aluminum 7005-W represents a crucial intermediate processing condition in the heat treatment cycle of this high-strength aluminum alloy. Its unstable nature and time-dependent properties make it particularly valuable for specific manufacturing processes requiring maximum formability after solution treatment. While not typically used as a final product temper, the W condition enables critical forming, welding, and shaping operations that would be difficult or impossible in the fully aged tempers. Understanding and properly managing the natural aging behavior of 7005-W is essential for manufacturers utilizing this condition in their production processes, particularly in aerospace and high-performance applications where precise control of final properties is required.

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 2103 gallon liquid totes Special package is available on request.