6262-T8 Aluminum alloy,Aluminum 6262-T8 alloy,E FORU

### **Aluminum 6262-T8 Alloy (UNS A96262) - Product Introduction** **Aluminum 6262-T8** is a heat-treatable aluminum-magnesium-silicon alloy with specialized free-machining characteristics. The "T8" temper designation indicates that the material has undergone solution heat treatment, cold working, and then artificial aging. This specific thermal-mechanical processing sequence results in enhanced strength and stress corrosion resistance compared to T6 temper, while maintaining the excellent machinability characteristic of the 6262 alloy series. --- #### **1. Chemical Composition** The chemical composition is carefully balanced to optimize both mechanical properties and machining characteristics: | 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 | | **Titanium (Ti)** | ≤ 0.08 | ≤ 0.08 | | **Others (Each)** | ≤ 0.03 | ≤ 0.03 | | **Others (Total)** | ≤ 0.08 | ≤ 0.08 | *The combination of Lead (Pb) and Bismuth (Bi) provides superior chip-breaking capability, while the Mg and Si content enables precipitation hardening.* --- #### **2. Physical Properties** Aluminum 6262-T8 maintains typical aluminum characteristics with enhanced mechanical properties: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.72 g/cm³ | 0.098 lb/in³ | | **Melting Range** | 580 - 650 °C | 1076 - 1202 °F | | **Electrical Conductivity** | 43-48 % IACS | 43-48 % IACS | | **Thermal Conductivity** | 165-175 W/m·K | 1145-1215 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 (T8 Temper)** The T8 temper provides improved strength and stress corrosion resistance: | Property | Metric Value | Imperial Value | |---|---|---| | **Tensile Strength, Ultimate** | 330 - 360 MPa | 47,800 - 52,200 psi | | **Tensile Strength, Yield (0.2% Offset)** | 300 - 330 MPa | 43,500 - 47,800 psi | | **Elongation at Break** | 8 - 10% | 8 - 10% | | **Hardness (Brinell)** | 100 - 105 HB | 100 - 105 HB | | **Shear Strength** | 205 MPa | 29,700 psi | | **Fatigue Strength** | 100 MPa | 14,500 psi | --- #### **4. International Standards** Aluminum 6262-T8 conforms to the following 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** * **EN:** **EN 573-3** (European Standard) --- #### **5. Product Applications** 6262-T8 is specified for applications requiring enhanced strength and stress corrosion resistance: * **High-Stress Fasteners:** Aircraft bolts, high-strength screws, and critical fasteners * **Aerospace Structural Components:** Brackets, fittings, and mounting hardware * **Marine Hardware:** Components exposed to corrosive marine environments * **Automotive Safety Components:** Seat belt mechanisms, brake system parts * **Hydraulic System Components:** High-pressure valve bodies and pistons * **Optical and Precision Instruments:** Stable structural components * **Electrical Hardware:** Connector bodies requiring strength and machinability --- #### **6. Key Advantages & Characteristics** * **Enhanced Strength Properties:** Higher yield and tensile strength compared to T6 temper * **Improved Stress Corrosion Resistance:** Better performance in corrosive environments under stress * **Excellent Machinability:** Maintains superior chip-breaking characteristics despite higher strength * **Good Thermal Stability:** Suitable for applications with moderate temperature variations * **Maintained Corrosion Resistance:** Better than 2011-T8 with similar machinability * **Predictable Aging Response:** Consistent mechanical properties due to controlled processing * **Good Surface Finish:** Responds well to machining and subsequent surface treatments **Conclusion:** Aluminum 6262-T8 represents an optimized version of the free-machining 6262 alloy, offering manufacturers an ideal balance of high strength, excellent machinability, and improved stress corrosion resistance. The specific T8 thermal-mechanical processing makes it particularly valuable for critical applications in aerospace, automotive, and marine industries where reliability under stress is paramount. Its compliance with international standards ensures consistent quality and performance across global supply chains.

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 2068 gallon liquid totes Special package is available on request.