6261 Aluminum alloy,Aluminum 6261 alloy,E FORU

### **Aluminum 6261 Alloy (UNS A96261) - Product Introduction** **Aluminum 6261** is a heat-treatable wrought aluminum-magnesium-silicon (Al-Mg-Si) alloy. It is very similar in composition to the widely used 6061 alloy but is specifically modified to achieve **higher mechanical properties**, particularly after artificial aging. It is known for offering an excellent combination of **high strength, good corrosion resistance, and very good electrical conductivity**. This makes it a premium choice for high-stress structural applications and specific electrical components. --- #### **1. Chemical Composition** The chemical composition of Aluminum 6261 is carefully balanced to optimize its strength and conductivity, conforming to international standards. | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.6 - 1.0 | 0.6 - 1.0 | | **Silicon (Si)** | 0.5 - 1.0 | 0.5 - 1.0 | | **Iron (Fe)** | 0.15 - 0.35 | 0.15 - 0.35 | | **Copper (Cu)** | 0.20 - 0.35 | 0.20 - 0.35 | | **Chromium (Cr)** | 0.10 - 0.25 | 0.10 - 0.25 | | **Manganese (Mn)** | ≤ 0.10 | ≤ 0.10 | | **Zinc (Zn)** | ≤ 0.20 | ≤ 0.20 | | **Titanium (Ti)** | ≤ 0.10 | ≤ 0.10 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | *Key Differentiator: The controlled and slightly higher levels of Iron (Fe) and Copper (Cu) compared to some 6xxx alloys like 6101 contribute to its enhanced strength in the T6 temper.* --- #### **2. Physical Properties** Aluminum 6261 offers a favorable blend of lightweight properties and functional characteristics. | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | ~ 580 - 650 °C | ~ 1076 - 1202 °F | | **Electrical Conductivity** | ~ 50-55 % IACS (T6 Temper) | ~ 50-55 % IACS | | **Thermal Conductivity** | 170 - 190 W/m·K | 1180 - 1320 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.6 x 10⁻⁶ /K | 13.1 x 10⁻⁶ /°F | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | --- #### **3. Mechanical Properties (Typical for T6 / T651 Temper)** The T6 temper is the most common condition for this alloy, where it achieves its peak strength. | Temper | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | |---|---|---|---| | **T6 / T651** | **310 - 350 MPa** | **280 - 330 MPa** | **9 - 12%** | *Note: The mechanical properties of 6261 in the T6 temper are generally higher than those of the standard 6061-T6 alloy.* --- #### **4. International Standards** Aluminum 6261 is recognized under several key international standards. * **ISO:** **EN AW-6261 (AlMgSiCu)** as per ISO 209. * **European Standard (EN):** **EN AW-6261** (Material Number 3.3215) in EN 573-3. * **UNS:** **A96261** * **ASTM:** * **ASTM B221:** Standard Specification for Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes. * **ASTM B317:** Standard Specification for Aluminum-Alloy Extruded Bar, Rod, Pipe, and Structural Shapes for Electrical Purposes (Bus Conductor). * **Other National Standards:** It has equivalents in various national standards, such as DIN (Germany) and BS (UK). --- #### **5. Product Applications** The primary application of 6261 alloy is in areas requiring a superior strength-to-weight ratio and good conductivity. * **High-Stress Structural Components:** Used in aerospace, transportation, and machinery where its higher strength compared to 6061 is advantageous. * **Electrical Conductors:** * **Busbars:** For electrical power distribution where higher mechanical load resistance is needed. * **Electrical Connectors and Fittings.** * **Marine Applications:** Components for boat building and offshore structures that benefit from its combination of strength and corrosion resistance. * **Precision Machined Parts:** Used for parts that require good machinability and stability after heat treatment. * **Welded Structures:** Suitable for fabrications that require high strength in the welded and aged condition. --- #### **6. Key Advantages & Characteristics** * **Higher Mechanical Strength:** Provides superior tensile and yield strength compared to 6061 and 6101 alloys in the T6 temper. * **Good Electrical Conductivity:** Maintains very good conductivity (typically >50% IACS), making it suitable for combined structural and electrical applications. * **Excellent Corrosion Resistance:** Inherits good resistance to atmospheric and marine corrosion, typical of Al-Mg-Si alloys. * **Good Formability and Weldability:** Can be easily extruded and welded using common techniques like MIG and TIG. * **Heat Treatable:** Achieves its high strength through solution heat treatment and artificial aging (T6 temper). **Conclusion:** Aluminum 6261 is a high-performance alloy within the Al-Mg-Si family, positioned as a stronger alternative to 6061. Its compliance with major international standards and its unique balance of high strength, good conductivity, and corrosion resistance make it an ideal material for demanding applications in structural engineering, electrical distribution, and the marine industry.

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 2064 gallon liquid totes Special package is available on request.