7001-O Aluminum alloy,Aluminum 7001-O alloy，E FORU

### **Aluminum 7001-O Alloy (UNS A97001) - Product Introduction** **Aluminum 7001-O** is the annealed temper of the ultra-high strength 7001 aluminum-zinc-magnesium-copper alloy. The "O" temper designation indicates that the material has been fully annealed to achieve the softest possible condition, providing maximum ductility and formability for this exceptionally high-strength alloy system. This condition is primarily used as an intermediate state for subsequent heat treatment and forming operations. --- #### **1. Chemical Composition** The chemical composition is designed for ultimate age-hardening capability: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 6.8 - 8.0 | 6.8 - 8.0 | | **Magnesium (Mg)** | 2.5 - 3.3 | 2.5 - 3.3 | | **Copper (Cu)** | 1.5 - 2.3 | 1.5 - 2.3 | | **Chromium (Cr)** | 0.06 - 0.16 | 0.06 - 0.16 | | **Zirconium (Zr)** | 0.08 - 0.15 | 0.08 - 0.15 | | **Iron (Fe)** | ≤ 0.20 | ≤ 0.20 | | **Silicon (Si)** | ≤ 0.15 | ≤ 0.15 | | **Manganese (Mn)** | ≤ 0.05 | ≤ 0.05 | | **Titanium (Ti)** | ≤ 0.05 | ≤ 0.05 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** Aluminum 7001-O exhibits typical physical properties in annealed condition: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.82 g/cm³ | 0.102 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 34-38 % IACS | 34-38 % IACS | | **Thermal Conductivity** | 130-145 W/m·K | 900-1005 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/K | 13.1 × 10⁻⁶/°F | | **Modulus of Elasticity** | 71 GPa | 10,300 ksi | --- #### **3. Mechanical Properties** The O temper provides maximum ductility for forming operations: | Property | Metric Value | Imperial Value | |---|---|---| | **Tensile Strength, Ultimate** | 240-280 MPa | 34,800-40,600 psi | | **Tensile Strength, Yield (0.2%)** | 120-160 MPa | 17,400-23,200 psi | | **Elongation in 50mm** | 12-16% | 12-16% | | **Hardness (Brinell)** | 75-85 HB | 75-85 HB | | **Shear Strength** | 170 MPa | 24,700 psi | | **Fatigue Strength** | 110 MPa | 16,000 psi | --- #### **4. International Standards** Aluminum 7001-O conforms to these international standards: * **ASTM:** **ASTM B247** for Aluminum-Alloy Die Forgings * **AMS:** **AMS 4332** (Aerospace Material Specification) * **UNS:** **A97001** * **ISO:** **AlZn8MgCu** under ISO 209 * **EN:** **EN AW-7001** (European Standard Equivalent) --- #### **5. Product Applications** Aluminum 7001-O is used as an intermediate for high-strength applications: * **Aerospace Components:** Structural parts requiring subsequent heat treatment * **Military Equipment:** Armor components, structural elements * **Sporting Goods:** High-strength bicycle frames, baseball bats * **Racing Components:** Automotive racing parts * **Defense Applications:** Missile components, military hardware * **High-Strength Structures:** Critical structural components * **Precision Forgings:** Complex forged components --- #### **6. Key Advantages & Characteristics** * **Maximum Formability:** Softest condition for this ultra-high-strength alloy * **Age-Hardening Potential:** Can achieve strengths exceeding 700 MPa after heat treatment * **Good Fracture Toughness:** Excellent damage tolerance characteristics * **High Strength-to-Weight Ratio:** Exceptional mechanical properties after aging * **Machinability:** Good machining characteristics in annealed condition * **Heat Treatable:** Excellent response to solution treatment and aging **Annealing Process:** - Annealing temperature: 415°C (780°F) - Soaking time: 2-3 hours - Controlled cooling rate (25°C/hour maximum to 260°C) - Air cooling to room temperature **Forming Characteristics:** - Suitable for moderate forming operations - Can be cold worked in annealed condition - Requires intermediate annealing for severe forming - Good for machining operations **Heat Treatment Response:** - Solution treatment: 465-475°C (870-885°F) - Artificial aging: 120-135°C (250-275°F) - Can achieve T6, T73 type tempers - Excellent strength development during aging --- **Processing Recommendations:** - Handle with care to prevent surface damage - Store in dry conditions to prevent corrosion - Complete major forming operations before final heat treatment - Use proper tooling for machining operations - Protect surfaces during handling and storage --- **Conclusion:** Aluminum 7001-O provides the essential intermediate condition for manufacturing ultra-high-strength components from this premium aerospace alloy. Its annealed state allows for necessary forming and machining operations before final heat treatment to achieve the exceptional strength properties characteristic of the 7001 alloy system. While primarily used as a processing intermediate, 7001-O offers unique capabilities for manufacturers requiring the ultimate in aluminum alloy strength combined with necessary fabricability for complex component production.

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 2095 gallon liquid totes Special package is available on request.