6351-T6; 6351-T651 Aluminum alloy,Aluminum 6351-T6; 6351-T651 alloy,E FORU

### **Aluminum 6351-T6 / 6351-T651 Alloy (EN AW-6351) - Product Datasheet** --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.45 - 0.9 | 0.40 - 0.8 | | **Silicon (Si)** | 0.80 - 1.2 | 0.70 - 1.3 | | **Iron (Fe)** | ≤ 0.50 | ≤ 0.50 | | **Copper (Cu)** | ≤ 0.10 | ≤ 0.10 | | **Manganese (Mn)** | 0.45 - 0.8 | 0.40 - 0.8 | | **Chromium (Cr)** | ≤ 0.25 | ≤ 0.20 | | **Zinc (Zn)** | ≤ 0.20 | ≤ 0.20 | | **Titanium (Ti)** | ≤ 0.10 | ≤ 0.10 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.71 g/cm³ | 0.0979 lb/in³ | | **Melting Range** | 580 - 650 °C | 1076 - 1202 °F | | **Electrical Conductivity** | 40-44 % IACS | 40-44 % IACS | | **Thermal Conductivity** | 170-185 W/m·K | 1180-1285 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/K | 13.0 × 10⁻⁶/°F | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | | **Shear Modulus** | 26 GPa | 3,770 ksi | --- #### **3. Mechanical Properties** **6351-T6 Temper:** - **Tensile Strength:** 270-320 MPa (39,200-46,400 psi) - **Yield Strength (0.2% Offset):** 240-290 MPa (34,800-42,100 psi) - **Elongation:** 8-12% - **Hardness (Brinell):** 95-105 HB - **Shear Strength:** 180 MPa (26,100 psi) **6351-T651 Temper:** - **Tensile Strength:** 280-330 MPa (40,600-47,900 psi) - **Yield Strength (0.2% Offset):** 250-300 MPa (36,300-43,500 psi) - **Elongation:** 8-11% - **Hardness (Brinell):** 98-108 HB - **Shear Strength:** 185 MPa (26,800 psi) --- #### **4. International Standards** - **EN:** EN AW-6351 (3.3207) - **ISO:** ISO 209 AlMgSi - **ASTM:** ASTM B221, ASTM B316 - **AMS:** AMS 4115 - **JIS:** JIS H 4040 - **GB/T:** GB/T 3190 --- #### **5. Product Applications** **T6 Temper Applications:** - **Structural Components:** High-strength structural members - **Marine Structures:** Boat frames and marine components - **Vehicle Parts:** Truck chassis components, trailer structures - **Architectural Systems:** Structural glazing, curtain walls - **Industrial Equipment:** Machinery frames, structural supports **T651 Temper Applications:** - **Aerospace Components:** Non-critical aircraft structures - **Precision Parts:** Machined components requiring stability - **Hydraulic Systems:** Valve bodies, pressure vessels - **Defense Applications:** Military vehicle components - **Transportation:** Railway components, automotive structures --- #### **6. Key Advantages & Characteristics** **T6 Temper Advantages:** - **High Strength:** Optimal strength for structural applications - **Good Toughness:** Balanced strength and ductility - **Corrosion Resistance:** Good atmospheric corrosion resistance - **Weldability:** Can be welded with proper procedures **T651 Temper Additional Advantages:** - **Dimensional Stability:** Stress-relieved for precision applications - **Reduced Distortion:** Minimal warping during machining - **Improved Machinability:** Better chip formation and surface finish - **Predictable Performance:** Consistent mechanical properties **Heat Treatment Specification:** - Solution Treatment: 515-540°C (960-1000°F) - Water quench - Artificial Aging: 160-180°C (320-355°F) - 8-12 hours - Stress Relieving (T651): 1.5-3% permanent set by stretching --- #### **7. Technical Notes** **Machining Characteristics:** - Good machinability in aged condition - Recommended tools: Carbide or high-speed steel - Use sharp tools with positive rake angles - Adequate cooling and lubrication required **Welding Considerations:** - Weldable using GTAW and GMAW processes - Post-weld heat treatment may be required - Filler alloy: 4043 or 5356 recommended - Pre-heat to 150-200°C (300-400°F) for thick sections **Corrosion Performance:** - Good resistance to atmospheric corrosion - Suitable for marine environments with proper protection - Stress corrosion cracking resistance requires proper heat treatment - Anodizing provides excellent surface protection --- **Quality Assurance:** All 6351-T6/T651 material supplied meets international standards with full traceability and certification. Proper heat treatment verification and quality control procedures are implemented to ensure consistent performance and reliability. --- **Disclaimer:** This data represents typical values and characteristics. Specific properties may vary based on manufacturing processes and section sizes. Users should verify suitability for specific applications and consult with materials engineers for critical applications.

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 2076 gallon liquid totes Special package is available on request.