6262-T651 Aluminum alloy,Aluminum 6262-T651 alloy,E FORU

### **Aluminum 6262-T651 Alloy (UNS A96262) - Product Introduction** **Aluminum 6262-T651** is a premium free-machining aluminum-magnesium-silicon alloy supplied in a specific thermal mechanical treatment condition. The "T651" temper designation indicates the material has undergone solution heat treatment, artificial aging, and then **stress-relieved by stretching** to ensure superior dimensional stability during subsequent machining operations. This alloy combines excellent machinability with good mechanical strength and improved corrosion resistance compared to other free-machining aluminum alloys. --- #### **1. Chemical Composition** The chemical composition follows strict international standards to ensure consistent performance: | Element | Content (%) (Typical) | Standard Range (ASTM) | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.6 - 1.0 | 0.6 - 1.0 | | **Silicon (Si)** | 0.4 - 0.8 | 0.4 - 0.8 | | **Iron (Fe)** | ≤ 0.15 | ≤ 0.15 | | **Copper (Cu)** | 0.15 - 0.35 | 0.15 - 0.35 | | **Lead (Pb)** | 0.4 - 0.7 | 0.4 - 0.7 | | **Bismuth (Bi)** | 0.4 - 0.7 | 0.4 - 0.7 | | **Chromium (Cr)** | ≤ 0.04 | ≤ 0.04 | | **Manganese (Mn)** | ≤ 0.08 | ≤ 0.08 | | **Zinc (Zn)** | ≤ 0.07 | ≤ 0.07 | | **Others (Each)** | ≤ 0.03 | ≤ 0.03 | | **Others (Total)** | ≤ 0.08 | ≤ 0.08 | *The balanced addition of Lead (Pb) and Bismuth (Bi) provides exceptional chip-breaking characteristics during machining operations.* --- #### **2. Physical Properties** Aluminum 6262-T651 exhibits typical aluminum characteristics with enhanced stability: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.72 g/cm³ | 0.098 lb/in³ | | **Melting Range** | 580 - 650 °C | 1076 - 1202 °F | | **Electrical Conductivity** | 45-50 % IACS | 45-50 % IACS | | **Thermal Conductivity** | 170-180 W/m·K | 1180-1250 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 | --- #### **3. Mechanical Properties (T651 Temper)** The T651 temper provides optimal mechanical properties with minimal stress-induced distortion: | Property | Metric Value | Imperial Value | |---|---|---| | **Tensile Strength, Ultimate** | 310 - 330 MPa | 45,000 - 48,000 psi | | **Tensile Strength, Yield (0.2% Offset)** | 275 - 300 MPa | 40,000 - 43,500 psi | | **Elongation at Break** | 10 - 12% | 10 - 12% | | **Hardness (Brinell)** | 95 - 100 HB | 95 - 100 HB | | **Fatigue Strength** | 95 MPa | 14,000 psi | --- #### **4. International Standards** Aluminum 6262-T651 complies with major international standards: * **ASTM:** * **ASTM B211:** Standard Specification for Aluminum-Alloy Bar, Rod, and Wire * **ASTM B221:** Standard Specification for Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes * **UNS:** **A96262** * **ISO:** **EN AW-6262** (3.3206) * **AMS:** **AMS 4331** (Aerospace Material Specification) * **SAE:** **SAE J454** --- #### **5. Product Applications** 6262-T651 is specifically designed for precision applications requiring dimensional stability: * **Precision Machined Components:** Critical parts requiring tight tolerances and minimal post-machining distortion * **Aerospace Components**: Aircraft fittings, mounting brackets, and structural parts * **Hydraulic System Components**: Valve bodies, pistons, and manifold blocks * **Optical and Instrumentation Parts**: Camera components, measurement device parts * **Automotive Applications**: Fuel system components, transmission parts, and precision fittings * **Electrical Connectors and Fittings**: Parts requiring good conductivity and machinability --- #### **6. Key Advantages & Characteristics** * **Superior Dimensional Stability:** The stress-relieving stretch in T651 temper minimizes warping and distortion during machining * **Excellent Machinability:** Lead and Bismuth additions provide superb chip formation and surface finish * **Good Corrosion Resistance:** Better corrosion performance compared to 2011 alloy * **High Strength-to-Weight Ratio:** Typical of heat-treated aluminum alloys * **Excellent Anodizing Response:** Accepts decorative and protective surface treatments well * **Consistent Mechanical Properties:** Guaranteed through strict thermal-mechanical processing controls **Conclusion:** Aluminum 6262-T651 represents the premium grade of free-machining aluminum alloys, offering manufacturers the ideal combination of machinability, dimensional stability, and mechanical performance. Its compliance with international aerospace and automotive standards makes it particularly valuable for critical applications where precision and reliability are paramount. The stress-relieved T651 condition ensures predictable performance in the most demanding machining environments.

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 2067 gallon liquid totes Special package is available on request.