7001-T75 Aluminum alloy,Aluminum 7001-T75 alloy，E FORU

### **Aluminum 7001-T75 Alloy (UNS A97001) - Product Introduction** **Aluminum 7001-T75** is an ultra-high strength aluminum-zinc-magnesium-copper alloy that has been solution heat-treated and overaged to the T75 temper. This specific aging condition provides an optimal balance of high strength and improved stress corrosion cracking resistance compared to the peak-aged T6 temper, making it suitable for applications where both high strength and environmental durability are critical requirements. --- #### **1. Chemical Composition** The chemical composition is engineered for high strength with improved environmental resistance: | 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-T75 maintains high-density characteristics with improved stability: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.82 g/cm³ | 0.102 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 40-44 % IACS | 40-44 % IACS | | **Thermal Conductivity** | 145-160 W/m·K | 1005-1110 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 | | **Shear Modulus** | 27 GPa | 3,920 ksi | --- #### **3. Mechanical Properties** **7001-T75 Mechanical Properties:** | Property | Metric Value | Imperial Value | |---|---|---| | **Tensile Strength, Ultimate** | 620-680 MPa | 89,900-98,600 psi | | **Tensile Strength, Yield (0.2%)** | 560-620 MPa | 81,200-89,900 psi | | **Elongation in 50mm** | 9-13% | 9-13% | | **Hardness (Brinell)** | 135-145 HB | 135-145 HB | | **Shear Strength** | 360 MPa | 52,200 psi | | **Fatigue Strength** | 170 MPa | 24,700 psi | | **Fracture Toughness** | 30-35 MPa·√m | 27-32 ksi·√in | --- #### **4. International Standards** Aluminum 7001-T75 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-T75 is specified for high-strength applications requiring environmental durability: * **Aerospace Structures:** Aircraft components exposed to corrosive environments * **Military Hardware:** Military vehicle components, defense systems * **Marine Applications:** Marine structural components, boat fittings * **Outdoor Sporting Equipment:** High-performance bicycle frames, climbing gear * **Automotive Racing:** Suspension components exposed to track environments * **Structural Components:** High-strength applications in corrosive environments * **Defense Equipment:** Military applications requiring field durability --- #### **6. Key Advantages & Characteristics** * **High Strength with Improved SCC Resistance:** Optimal balance of strength and durability * **Excellent Strength-to-Weight Ratio:** Maintains high mechanical properties * **Superior Stress Corrosion Cracking Resistance:** Significant improvement over T6 temper * **Good Fatigue Performance:** Excellent resistance to cyclic loading * **Improved Fracture Toughness:** Better damage tolerance than T6 condition * **Thermal Stability:** Maintains properties at moderate temperatures * **Good Machinability:** Suitable for precision machining operations **Heat Treatment Process:** - Solution Treatment: 465-475°C (870-885°F) - Rapid quenching in water or polymer - Artificial Aging: Two-stage aging process - First stage: 120-135°C (250-275°F) - Second stage: 160-175°C (320-347°F) for overaging **T75 vs T6 Characteristics:** - **T75:** 10-15% lower strength than T6, but significantly better SCC resistance - **T75:** Improved dimensional stability - **T75:** Better performance in corrosive environments - **T75:** Superior long-term reliability **Environmental Performance:** - Excellent resistance to stress corrosion cracking - Good exfoliation corrosion resistance - Suitable for marine and industrial atmospheres - Maintains properties in various environmental conditions --- **Processing Recommendations:** - Use carbide tooling for optimal machining results - Handle with care to prevent surface damage - Store in controlled environments when possible - Follow recommended heat treatment procedures strictly - Use proper corrosion protection for long-term storage **Design Considerations:** - Ideal for applications requiring both high strength and corrosion resistance - Suitable for components exposed to tensile stresses in corrosive environments - Excellent for safety-critical applications requiring long-term reliability - Preferred over T6 for applications where stress corrosion is a concern --- **Conclusion:** Aluminum 7001-T75 offers an exceptional balance of ultra-high strength and improved environmental durability, making it the preferred choice for critical applications where both mechanical performance and long-term reliability are essential. While providing slightly lower strength than the T6 temper, the T75 condition delivers significantly enhanced resistance to stress corrosion cracking and improved overall durability. This combination of properties makes 7001-T75 particularly valuable for aerospace, military, and high-performance applications operating in demanding environmental conditions where failure due to stress corrosion cannot be tolerated.

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 2097 gallon liquid totes Special package is available on request.