6262A Aluminum alloy,Aluminum 6262A alloy,E FORU

### **Aluminum 6262A Alloy (EN AW-6262A) - Product Introduction** **Aluminum 6262A** is a heat-treatable wrought aluminum-magnesium-silicon (Al-Mg-Si) alloy, widely recognized as an improved version of the standard 6262 alloy. It is specifically designed to possess **excellent free-machining characteristics**, combined with good mechanical properties and corrosion resistance. A key feature of this alloy is the addition of a small amount of lead (Pb) and bismuth (Bi), which gives it superior machinability, allowing for the production of smooth finishes and small, broken chips at high cutting speeds. It is often considered the premium choice for screw machine products and complex, precision-machined components. --- #### **1. Chemical Composition** The chemical composition of Aluminum 6262A is carefully controlled, with the key addition of lead and bismuth to enhance machinability, conforming to the EN standard. | Element | Content (%) (Typical) | Standard Range (EN 573-3) | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.8 - 1.2 | 0.8 - 1.2 | | **Silicon (Si)** | 0.5 - 1.0 | 0.5 - 1.0 | | **Iron (Fe)** | ≤ 0.15 | ≤ 0.15 | | **Copper (Cu)** | 0.15 - 0.35 | 0.15 - 0.35 | | **Chromium (Cr)** | ≤ 0.04 | ≤ 0.04 | | **Manganese (Mn)** | ≤ 0.08 | ≤ 0.08 | | **Zinc (Zn)** | ≤ 0.07 | ≤ 0.07 | | **Lead (Pb)** | 0.40 - 0.9 | 0.40 - 0.9 | | **Bismuth (Bi)** | 0.20 - 0.9 | 0.20 - 0.9 | | **Titanium (Ti)** | ≤ 0.08 | ≤ 0.08 | | **Others (Each)** | ≤ 0.03 | ≤ 0.03 | | **Others (Total)** | ≤ 0.08 | ≤ 0.08 | *The combined addition of Lead (Pb) and Bismuth (Bi) is the defining characteristic, providing excellent chip-breaking and surface finish properties during machining.* --- #### **2. Physical Properties** Aluminum 6262A offers typical lightweight aluminum properties, suitable for a wide range of applications. | 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 (T6 Temper) | ~ 45-50 % IACS | | **Thermal Conductivity** | 160 - 180 W/m·K | 1110 - 1250 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.4 x 10⁻⁶ /K | 13.0 x 10⁻⁶ /°F | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | --- #### **3. Mechanical Properties (Typical for T6 / T6511 Tempers)** The T6 temper is the most common condition, providing the best combination of strength and machinability. | Temper | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | |---|---|---|---| | **T6 / T6511** | **300 - 350 MPa** | **260 - 310 MPa** | **8 - 12%** | *Note: T6511 refers to extruded and stress-relieved rod/bar for improved dimensional stability during machining.* --- #### **4. International Standards** Aluminum 6262A is recognized and specified under several key international standards, particularly in Europe. * **European Standard (EN):** **EN AW-6262A** (Material Number 3.3207) as per EN 573-3. This is the primary standard for this alloy. * **ISO:** **AlMgSiPbBi** under ISO 209. * **ASTM:** * While not as common in general ASTM standards as 6061, its composition and properties are similar to **ASTM B211** for Aluminum-Alloy Bar, Rod, and Wire. * **UNS:** While 6262 has a UNS designation (A96262), the "A" variant is more distinctly defined in European standards. --- #### **5. Product Applications** The primary application of 6262A alloy is in the production of precision-machined components. * **Screw Machine Products:** Ideal for nuts, bolts, screws, and other fasteners produced on automatic screw machines. * **Hydraulic Fittings:** Widely used for manifolds, connectors, and adapters in hydraulic systems due to its pressure tightness and machinability. * **Valve Bodies and Pistons:** For pneumatic and hydraulic applications. * **Camera and Optical Equipment:** Complex, small, and high-tolerance parts. * **Aerospace and Automotive:** Non-critical machined components, fittings, and couplings where good strength and light weight are required. * **Electrical Connectors:** Where good machinability and decent electrical conductivity are needed. --- #### **6. Key Advantages & Characteristics** * **Excellent Free-Machinability:** Its most defining feature. The Pb/Bi addition allows for high cutting speeds, excellent surface finish, and short, broken chips, which prolongs tool life. * **Good Mechanical Strength:** After T6 tempering, it offers strength comparable to 6061, making it suitable for structural components. * **Good Corrosion Resistance:** Maintains good resistance to atmospheric corrosion, similar to other Al-Mg-Si alloys. * **Anodizing Response:** Responds well to anodizing processes, providing a hard, decorative, and protective surface layer. * **Heat Treatable:** Achieves its strength through solution heat treatment and artificial aging (T6 temper). **Conclusion:** Aluminum 6262A is a specialized, high-performance free-machining alloy. Its compliance with stringent European standards and its superior machinability make it the material of choice for manufacturers of high-volume, precision-machined components across the automotive, hydraulic, and general engineering industries. It successfully bridges the gap between the high strength of 6061 and the superior machinability of leaded alloys like 2011, while offering better corrosion resistance than the latter.

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 2065 gallon liquid totes Special package is available on request.