2015 Aluminum alloy,Aluminum 2015 alloy,E FORU

### **Technical Datasheet: 2015 Aluminum Alloy** **2015 Aluminum Alloy** is a high-strength, heat-treatable alloy belonging to the aluminum-copper series (2xxx series). It is known for its excellent **machinability** and good strength, similar to its more common cousin, 2014. A key characteristic of 2015 is its addition of **Bismuth (Bi)**, which, along with Lead (Pb), enhances its free-machining properties, making it capable of achieving high-speed machining and a superior surface finish. This alloy is primarily supplied in heat-treated tempers (such as T4 or T6) to achieve its mechanical properties and is often used in applications where complex machining is required. --- ### **1. Chemical Composition** The typical chemical composition of 2015 Aluminum Alloy is standardized as follows (weight %): | Element | Content (%) | | :--- | :--- | | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.9 - 5.0 | | **Silicon (Si)** | 0.50 - 1.2 | | **Manganese (Mn)** | 0.40 - 1.2 | | **Magnesium (Mg)** | 0.20 - 0.8 | | **Bismuth (Bi)** | 0.20 - 0.8 | | **Lead (Pb)** | 0.20 - 0.8 | | **Chromium (Cr)** | ≤ 0.10 | | **Zinc (Zn)** | ≤ 0.25 | | **Iron (Fe)** | ≤ 0.50 | | **Others (Each)** | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | **Key Point:** The presence of both **Bismuth (Bi)** and **Lead (Pb)** is the defining feature of 2015. These low-melting-point elements act as chip breakers during machining, significantly improving machinability and tool life. --- ### **2. Physical Properties** The physical properties for 2015 Aluminum Alloy are similar to other Al-Cu alloys like 2014. | Property | Value | | :--- | :--- | | **Density** | ~2.80 g/cm³ (0.101 lb/in³) | | **Melting Range** | ~ 507 - 640 °C (945 - 1185 °F) | | **Electrical Conductivity** | ~30-38% IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ~130 - 150 W/m·K | | **Coefficient of Thermal Expansion (20-100°C)** | ~23.0 x 10⁻⁶/°C (12.8 x 10⁻⁶/°F) | | **Modulus of Elasticity (Elastic Modulus)** | ~72.4 GPa (10.5 x 10⁶ psi) | --- ### **3. Mechanical Properties (Typical)** Mechanical properties are highly dependent on the temper (heat treatment condition). Common tempers include T3/T4 (solution heat-treated and naturally aged) and T6 (solution heat-treated and artificially aged). | Property | 2015-T4 Condition (Typical) | 2015-T6 Condition (Typical) | | :--- | :--- | :--- | | **Tensile Ultimate Strength** | 345 - 415 MPa (50 - 60 ksi) | 450 - 485 MPa (65 - 70 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 200 - 240 MPa (29 - 35 ksi) | 380 - 415 MPa (55 - 60 ksi) | | **Elongation (in 50 mm)** | 15 - 20% | 8 - 12% | | **Hardness (Brinell)** | ~ 105 HB | ~ 135 HB | --- ### **4. Key Characteristics & Applications** #### **Key Characteristics:** * **Excellent Machinability:** The primary advantage of 2015. The combination of Bismuth and Lead gives it a top-tier "A" rating for machinability, allowing for high cutting speeds, improved surface finish, and extended tool life. * **High Strength:** When heat-treated to the T6 temper, it achieves strength levels comparable to other high-strength 2xxx series alloys. * **Fair Weldability:** Similar to other Al-Cu alloys, it has poor arc welding (MIG/TIG) characteristics due to a high susceptibility to hot cracking. Resistance welding (spot, seam) is more feasible. * **Poor Corrosion Resistance:** The high copper content makes it susceptible to corrosion, particularly in saltwater environments. Protective coatings such as paint or anodizing are often required for service. * **Good Workability:** Forming operations are best performed in the annealed ("O") temper or the softer T4 temper before final aging to T6. #### **Primary Applications:** 2015 is specifically chosen for applications that demand extensive and precise machining. * **Complex Machined Parts:** Screw machine products, intricate fittings, valves, and hydraulic components. * **Automotive (High-Performance):** High-specification engine components, transmission parts, and powertrain mounts. * **Aerospace:** Certain non-critical structural components, fittings, and fixtures that require complex geometry and high strength. * **Industrial Machinery:** Gears, couplings, and other heavy-duty mechanical parts manufactured from bar stock. --- ### **5. International Standards** 2015 Aluminum Alloy is recognized by several major standards organizations, though it is less universally standardized than 2014 or 2024. | Standard Body | Standard Designation | | :--- | :--- | | **Aluminum Association (AA)** | **AA 2015** (The foundational standard) | | **ASTM International** | **ASTM B211** (Standard Specification for Aluminum-Alloy Bar, Rod, and Wire) | | **Aerospace (AMS)** | **AMS 4120** (Aluminum Alloy Bar and Rod, 2015, As-Hand Forged) - Note: Specific AMS standards may be limited. | | **European (EN)** | **EN AW-2015** / **EN 573-3** | | **Unified Numbering System (UNS)** | **UNS A92015** | --- ### **Summary** **2015 Aluminum Alloy** is a specialized, high-strength alloy engineered for **superior machinability**. Its defining chemical components are Bismuth and Lead, which make it an ideal choice for producing complex, high-precision components via screw machining or other intensive machining processes. **Selection Consideration:** Choose 2015 when the primary manufacturing requirement is extensive and high-speed machining, and the application demands the strength of a 2xxx-series alloy. Its use is often a trade-off, prioritizing machinability over weldability and corrosion resistance. For applications not requiring the extreme machinability of 2015, alloys like 2014 or 2024 are more common alternatives.

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 1522 gallon liquid totes Special package is available on request.