6013-T651 Aluminum alloy,Aluminum 6013-T651 alloy,E FORU

### **Product Introduction: 6013-T651 Aluminum Alloy** **6013-T651 Aluminum Alloy** is a high-strength, heat-treatable aluminum-magnesium-silicon-copper (Al-Mg-Si-Cu) alloy known for its excellent combination of strength, corrosion resistance, and machining characteristics. The T651 temper indicates the material has been solution heat-treated, stress-relieved by stretching, and artificially aged to achieve optimal mechanical properties with minimal residual stress, making it particularly suitable for precision-machined aerospace and military components. --- ### **1. International Standards** 6013-T651 Aluminum Alloy is recognized under the following international standards: - **AA (Aluminum Association, USA):** AA 6013, Temper T651 - **UNS (Unified Numbering System):** UNS A96013 - **AMS (Aerospace Material Specification):** AMS 4334 - **ASTM:** ASTM B209 (Plate), ASTM B211 (Bar) - **ISO (International Organization for Standardization):** AlMg0.8SiCu --- ### **2. Chemical Composition** The chemical composition limits (in weight percentage) are specified as follows: | Element | Content (%) | |:---------|:------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 0.60 - 1.0 | | **Magnesium (Mg)** | 0.80 - 1.2 | | **Manganese (Mn)** | 0.20 - 0.8 | | **Copper (Cu)** | 0.60 - 1.1 | | **Iron (Fe)** | ≤ 0.50 | | **Chromium (Cr)** | 0.10 - 0.30 | | **Zinc (Zn)** | ≤ 0.25 | | **Titanium (Ti)** | ≤ 0.10 | | **Others (each)** | ≤ 0.05 | | **Others (total)** | ≤ 0.15 | **Key Takeaway:** The balanced combination of copper (0.60-1.1%) and magnesium (0.80-1.2%) provides excellent strength through precipitation hardening, while chromium addition enhances stress corrosion cracking resistance. --- ### **3. Physical Properties** The typical physical properties of 6013-T651 aluminum alloy are: | Property | Metric Value | Imperial Value | |:----------|:-------------|:---------------| | **Density** | 2.71 g/cm³ | 0.0979 lb/in³ | | **Melting Range** | 555 - 650 °C | 1031 - 1202 °F | | **Coefficient of Thermal Expansion** | 23.2 × 10⁻⁶/°C (20-100°C) | 12.9 × 10⁻⁶/°F (68-212°F) | | **Thermal Conductivity** | 145 - 165 W/m·K | 840 - 955 BTU·in/(hr·ft²·°F) | | **Electrical Conductivity** | 35-40% IACS | 35-40% IACS | | **Modulus of Elasticity** | 70 GPa | 10,150 ksi | | **Shear Modulus** | 26.5 GPa | 3,840 ksi | | **Poisson's Ratio** | 0.33 | 0.33 | --- ### **4. Mechanical Properties (T651 Temper)** The T651 temper provides stable, high-strength properties with minimal stress for machining: **Typical Mechanical Properties:** - **Tensile Strength:** 395 - 435 MPa (57 - 63 ksi) - **Yield Strength (0.2% Offset):** 355 - 395 MPa (51 - 57 ksi) - **Elongation (% in 50mm):** 7-10% - **Compressive Yield Strength:** 345 MPa (50 ksi) - **Shear Strength:** 240 MPa (35 ksi) - **Fatigue Strength:** 125 MPa (18 ksi) [Rotating Beam, 5×10⁸ cycles] - **Hardness (Brinell):** 120 - 130 HB (500 kg load, 10 mm ball) - **Fracture Toughness (KIC):** 28-32 MPa√m --- ### **5. Product Applications** 6013-T651 is primarily used in high-performance applications requiring strength, corrosion resistance, and dimensional stability: - **Aerospace Components:** - Aircraft fuselage skins - Wing ribs and structural members - Bulkheads and frame components - Helicopter structural parts - **Military Applications:** - Armored vehicle components - Military bridge structures - Weapon system components - Military vehicle structures - **Transportation:** - High-speed train components - Bus and rail vehicle structures - Truck chassis components - **Precision Components:** - Machine tool components - Optical equipment mounts - Precision instrument frames --- ### **6. Key Characteristics & Advantages** - **High Strength-to-Weight Ratio:** Provides excellent mechanical properties comparable to some 2000-series alloys while maintaining better corrosion resistance. - **Superior Stress Corrosion Resistance:** Offers significantly better resistance to stress corrosion cracking compared to high-copper 2000-series alloys. - **Excellent Machinability:** Good machining characteristics in the T651 temper, producing clean cuts with good surface finish. - **Good Fatigue Performance:** Demonstrated excellent fatigue resistance for aerospace and structural applications. - **Stable Mechanical Properties:** The T651 temper ensures minimal distortion during machining operations due to stress relief through stretching. - **Good Weldability:** Can be welded using conventional methods, though properties in the heat-affected zone may be affected. - **Excellent Anodizing Response:** Responds well to various surface treatments including chromic acid and sulfuric acid anodizing. --- ### **7. Processing Characteristics** **Heat Treatment Cycle (T651):** - Solution Heat Treatment: 510-530°C (950-985°F) - Quenching: Rapid water quench - Stress Relieving: Stretched 1.5-3% permanent set - Artificial Aging: 120-160°C (250-320°F) for 12-24 hours **Machining Performance:** - **Machinability Rating:** 70-80 (compared to 2011-T3 as 100) - Good chip formation characteristics - Suitable for high-speed machining operations - Maintains dimensional stability during heavy machining **Forming Characteristics:** - Best formed in annealed (O) temper - Can be formed in T4 temper for less severe operations - Springback must be accounted for in design --- ### **8. Corrosion Performance** - **General Corrosion:** Good resistance to atmospheric exposure - **Stress Corrosion Cracking:** Excellent resistance in T651 temper - **Exfoliation Corrosion:** Resistant in properly heat-treated condition - **Intergranular Corrosion:** Good resistance when properly aged **Protection Methods:** - Chromic acid anodizing (MIL-A-8625) - Sulfuric acid anodizing - Chemical conversion coating (MIL-DTL-5541) - Primer and paint systems --- ### **9. Quality and Certification** - **Aerospace Compliance:** Meets AMS 4334 requirements - **Military Standards:** Compliant with relevant MIL specifications - **Traceability:** Full material traceability available - **Testing:** Standard mechanical testing, ultrasonic inspection available --- ### **10. Comparative Advantages** **vs. 2024-T351:** - Better corrosion resistance - Comparable strength - Superior stress corrosion cracking resistance **vs. 6061-T651:** - Significantly higher strength - Better fatigue performance - Superior damage tolerance **vs. 7075-T651:** - Better corrosion resistance - Superior stress corrosion cracking resistance - Good strength compromise In summary, **6013-T651 Aluminum Alloy** represents a premium aerospace-grade material that delivers an optimal balance of high strength, excellent corrosion resistance, and good manufacturing characteristics. Its unique combination of properties makes it particularly valuable for aerospace, military, and high-performance transportation applications where reliability, durability, and weight reduction are critical requirements. The T651 temper ensures dimensional stability for precision machining of complex components.

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 1958 gallon liquid totes Special package is available on request.