3110 Aluminum alloy,Aluminum 3110 alloy,E FORU

### **Product Introduction: Aluminum 3110 Alloy** **Overview** Aluminum 3110 Alloy is a non-heat-treatable aluminum alloy specifically formulated for excellent machinability. It belongs to the aluminum-magnesium-silicon family but is distinguished by the deliberate addition of Lead (Pb) and Bismuth (Bi), which gives it a "Free-Machining" characteristic. This makes it an exceptional choice for high-speed automatic screw machine operations (like CNC machining) where the production of complex, precise parts with a superior surface finish is required. While its corrosion resistance and strength are moderate, its primary advantage lies in its unparalleled ease of machining compared to standard aluminum alloys. --- ### **1. Chemical Composition (Typical Weight %)** The composition of 3110 alloy is engineered to promote chip-breaking and improve surface finish during machining. | Element | Content (%) | | :--- | :--- | | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 0.40 - 0.7 | | **Iron (Fe)** | ≤ 0.7 | | **Copper (Cu)** | 0.20 - 0.6 | | **Manganese (Mn)** | 0.10 - 0.4 | | **Magnesium (Mg)** | 0.40 - 0.7 | | **Zinc (Zn)** | ≤ 0.20 | | **Lead (Pb)** | 0.20 - 0.5 | | **Bismuth (Bi)** | 0.20 - 0.5 | | **Others (Each)** | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | *The combination of Lead (Pb) and Bismuth (Bi) creates a low-friction, discontinuous chip, which is the key to its free-machining properties.* --- ### **2. Physical Properties** 3110 Aluminum exhibits physical properties typical for its class, with its machinability being the standout feature. | Property | Value / Description | | :--- | :--- | | **Density** | ~2.74 g/cm³ (0.099 lb/in³) | | **Melting Range** | ~ 595 - 650 °C (~ 1100 - 1200 °F) | | **Electrical Conductivity** | ~ 45-50% IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ~ 170 - 190 W/m·K | | **Coefficient of Thermal Expansion** | ~ 23.2 x 10⁻⁶/°C (at 20-100°C) | | **Modulus of Elasticity** | ~ 70 GPa (10,000 ksi) | --- ### **3. Mechanical Properties (Typical for T5 Temper)** 3110 is commonly supplied in the T5 temper (cooled from an elevated temperature shaping process and then artificially aged), which provides a good balance of strength and machinability. | Property | Value (T5 Temper - Typical) | | :--- | :--- | | **Tensile Strength** | 240 - 270 MPa (35 - 39 ksi) | | **Yield Strength (0.2% Offset)** | 205 - 235 MPa (30 - 34 ksi) | | **Elongation (in 50mm)** | 8% - 12% | | **Hardness (Brinell)** | ~ 80 HB | --- ### **4. International Standards** 3110 aluminum alloy is recognized by several major standards organizations, though it is most prominent in North America. | Standard Body | Alloy Designation | | :--- | :--- | | **Aluminum Association (AA)** | AA 3110 | | **UNS Number** | UNS A93110 | | **ASTM** | ASTM B211 (Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire) | *Note: This alloy is less common in European (EN) standards, where other free-machining alloys like 2011A are more prevalent.* --- ### **5. Product Applications** The primary application for 3110 is in the production of precision-machined components. * **Automotive:** * Fuel system components * Sensor housings * Connectors and fittings * **Hydraulics and Pneumatics:** * Valve bodies * *Piston heads* * *Compressor parts* * **General Machinery:** * Screws, nuts, and fasteners (requiring high precision) * Gears and couplings * Bushings and fittings * **Consumer Goods:** * Components for cameras, sporting goods, and appliances. --- ### **6. Key Characteristics & Advantages** * **Excellent Machinability:** This is the defining characteristic. 3110 offers one of the highest machinability ratings among aluminum alloys, allowing for high cutting speeds, excellent chip control, and superior surface finish. * **Good Strength-to-Weight Ratio:** Provides decent mechanical properties for a wide range of mechanical applications. * **Fair Corrosion Resistance:** Offers adequate resistance for many indoor applications; however, the presence of copper makes it less resistant than 5xxx or 6xxx series alloys like 6061, especially in marine environments. Anodizing or other surface treatments are often applied for enhanced protection. * **Good Anodizing Response:** Can be anodized for improved surface hardness and corrosion resistance, though the finish may not be as clear as on purer alloys. **Disclaimer:** The information provided herein is for reference purposes only. Mechanical and physical properties can vary based on temper, product form, and manufacturer. Due to the presence of lead (Pb), this alloy may not be suitable for applications involving contact with food, water, or in certain regulated markets (e.g., RoHS). For critical applications, always consult the manufacturer's data sheets and conduct appropriate testing.

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 1716 gallon liquid totes Special package is available on request.