7039-T61 Aluminum alloy,Aluminum 7039-T61 alloy，E FORU

### **Aluminum 7039-T61 Alloy (EN AW-7039) - Product Introduction** **Aluminum 7039-T61** is a high-strength aluminum-zinc-magnesium alloy that has been solution heat-treated, quenched, and artificially aged to achieve specific mechanical properties optimized for ballistic applications. The T61 temper designation indicates a controlled aging process that provides an excellent balance of strength and toughness, making it particularly suitable for armor plate applications. --- #### **1. Chemical Composition** The chemical composition is optimized for ballistic performance: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 3.8 - 4.8 | 3.8 - 4.8 | | **Magnesium (Mg)** | 2.6 - 3.4 | 2.6 - 3.4 | | **Chromium (Cr)** | 0.15 - 0.25 | 0.15 - 0.25 | | **Manganese (Mn)** | 0.10 - 0.40 | 0.10 - 0.40 | | **Copper (Cu)** | ≤ 0.10 | ≤ 0.10 | | **Iron (Fe)** | ≤ 0.40 | ≤ 0.40 | | **Silicon (Si)** | ≤ 0.30 | ≤ 0.30 | | **Zirconium (Zr)** | ≤ 0.05 | ≤ 0.05 | | **Titanium (Ti)** | ≤ 0.10 | ≤ 0.10 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** Aluminum 7039-T61 exhibits excellent physical properties for armor applications: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.78 g/cm³ | 0.100 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 38-42 % IACS | 38-42 % 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** **7039-T61 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** | 12-16% | 12-16% | | **Hardness (Brinell)** | 115-125 HB | 115-125 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 7039-T61 conforms to these international standards: * **MIL:** **MIL-DTL-46027** (Armor Plate Specification) * **ASTM:** **ASTM B209**, **ASTM B928** * **AMS:** **AMS 4050** (Aerospace Material Specification) * **UNS:** **A97039** * **NATO:** **STANAG 4569** (Protection Levels) --- #### **5. Product Applications** Aluminum 7039-T61 is primarily used in ballistic protection applications: * **Military Vehicles:** Armored personnel carriers, infantry fighting vehicles * **Aircraft Armor:** Helicopter armor, military aircraft protection * **Naval Applications:** Ship armor, naval vessel protection * **Security Vehicles:** Armored cash trucks, VIP protection vehicles * **Body Armor:** Light armored vehicle protection * **Defense Structures:** Military bunkers, protective structures * **Aerospace:** Aircraft landing gear, structural components * **Industrial Protection:** Blast protection equipment --- #### **6. Key Advantages & Characteristics** * **Excellent Ballistic Performance:** Superior resistance to projectiles and fragments * **High Strength-to-Weight Ratio:** Optimal for weight-sensitive armor applications * **Good Toughness:** Balanced combination of strength and fracture resistance * **Weldability:** Can be welded using specialized armor welding techniques * **Multi-hit Capability:** Maintains integrity after multiple impacts * **Good Stress Corrosion Resistance:** Suitable for various environmental conditions * **Formability:** Can be formed into complex armor shapes * **Spall Resistance:** Minimizes fragmentation upon impact **Heat Treatment Process:** - Solution Treatment: 465-480°C (870-900°F) - Rapid quenching in water or polymer - Artificial Aging: 120-140°C (250-285°F) for specific duration - Controlled cooling to room temperature **Ballistic Performance:** - Excellent against small arms projectiles - Good fragment protection capability - Multi-hit performance maintenance - Consistent ballistic properties **T61 Temper Characteristics:** - Optimized for ballistic applications - Balanced strength and toughness - Good stress corrosion resistance - Suitable for military specifications --- **Quality Assurance:** - Ballistic testing certification - Strict chemical composition controls - Mechanical property verification - Non-destructive testing requirements - Full traceability and lot certification **Processing Recommendations:** - Use specialized cutting tools for armor applications - Follow strict heat treatment protocols - Implement controlled welding procedures - Conduct regular ballistic verification testing - Maintain detailed processing records --- **Conclusion:** Aluminum 7039-T61 represents a specialized high-strength aluminum alloy specifically engineered for ballistic protection applications. Its unique combination of mechanical properties, ballistic resistance, and good toughness makes it an ideal choice for military, security, and protective applications. The T61 temper provides an optimal balance of characteristics needed for reliable ballistic performance while maintaining reasonable weight and good manufacturability. For applications requiring certified ballistic protection combined with aluminum's inherent advantages of light weight and corrosion resistance, Aluminum 7039-T61 delivers proven performance and reliability in the most demanding protective scenarios.

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 2135 gallon liquid totes Special package is available on request.