2028A Aluminum alloy,Aluminum 2028A alloy,E FORU

### **Aluminum 2028A Alloy Product Introduction** **Overview** 2028A Aluminum Alloy is an improved version of the standard 2028 alloy, offering enhanced mechanical properties and more consistent performance characteristics. As a high-strength aluminum-copper alloy with excellent machinability, it maintains the superior free-machining properties of the 2028 series while providing better mechanical strength and improved production consistency for precision components. --- #### **1. Chemical Composition** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.2 - 4.2 | | **Silicon (Si)** | 0.9 - 1.6 | | **Iron (Fe)** | ≤ 0.6 | | **Manganese (Mn)** | 0.25 - 0.7 | | **Magnesium (Mg)** | 0.45 - 0.9 | | **Zinc (Zn)** | ≤ 0.4 | | **Lead (Pb)** | 0.9 - 1.6 | | **Bismuth (Bi)** | 0.5 - 0.9 | | **Titanium (Ti)** | 0.05 - 0.15 | | **Other Elements** | ≤ 0.15 total | --- #### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.88 g/cm³ (0.104 lb/in³) | | **Melting Range** | 518°C - 642°C (964°F - 1188°F) | | **Electrical Conductivity** | 36-41% IACS | | **Thermal Conductivity** | 138-148 W/m·K | | **Coefficient of Thermal Expansion** | 23.7 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 70.5 GPa (10,220 ksi) | | **Poisson's Ratio** | 0.33 | --- #### **3. Mechanical Properties** **Typical Mechanical Properties (T6 Temper):** | Property | Value | |----------|-------| | **Tensile Strength** | 350-400 MPa (51-58 ksi) | | **Yield Strength (0.2% Offset)** | 260-310 MPa (38-45 ksi) | | **Elongation in 2 inches** | 9-14% | | **Shear Strength** | 210-250 MPa (30-36 ksi) | | **Fatigue Strength** | 120 MPa (17 ksi) | | **Brinell Hardness** | 100-110 HB | | **Machinability Rating** | Excellent (97% of free-cutting brass) | --- #### **4. International Standards** | Standard System | Designation | Product Form | |-----------------|-------------|--------------| | **ASTM** | ASTM B211 | Rod, Bar | | **EN** | EN AW-2028A | Extruded Products | | **UNS** | A92028 | - | | **JIS** | A2028 | Bar, Rod | --- #### **5. Product Applications** **Automotive Industry:** - Precision transmission components - Fuel injection system parts - Engine management components - Steering system parts - Brake system components **Aerospace Applications:** - Aircraft control system components - Instrumentation housings - Avionics mounting hardware - Non-critical structural fittings - Electrical system components **Industrial Applications:** - High-precision screw machine products - Hydraulic valve components - Pneumatic system parts - Pump shafts and impellers - Machinery structural components **Electronics Applications:** - Connector housings - Heat sink components - Electronic packaging parts - Precision mechanical components - Optical instrument parts --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Enhanced Mechanical Properties** over standard 2028 - ✅ **Superior Machinability** with excellent chip formation - ✅ **Improved Consistency** in production batches - ✅ **Good Thermal Conductivity** - ✅ **Excellent Surface Finish** capabilities - ✅ **Extended Tool Life** in machining operations **Considerations:** - ⚠️ **High Lead Content** - environmental restrictions apply - ⚠️ **Limited Corrosion Resistance** - requires surface protection - ⚠️ **Not Suitable for Welding** - ⚠️ **Special Handling Requirements** - ⚠️ **Regulatory Compliance** challenges in some markets --- **Heat Treatment Characteristics** **Available Tempers:** - O: Annealed condition - T4: Solution heat-treated and naturally aged - T6: Solution heat-treated and artificially aged (most common) **Recommended T6 Heat Treatment:** - Solution Treatment: 505-515°C (941-959°F) - Quenching: Controlled water quench - Artificial Aging: 155-165°C (311-329°F) for 8-12 hours --- **Machining Performance** **Machinability:** Excellent (rated 97% of free-cutting brass) **Optimal Cutting Speed:** 200-300 m/min **Tool Material:** Carbide recommended for production runs **Surface Finish:** Ra 0.8-1.6 μm achievable **Chip Characteristics:** Short, easily disposable chips --- **Quality Control Standards** **Production Requirements:** - Strict chemical composition control - Consistent mechanical properties - Uniform microstructure - Reliable machinability performance - Dimensional stability assurance **Testing Protocols:** - Chemical analysis verification - Mechanical property testing - Machinability performance evaluation - Microstructural examination - Surface quality assessment --- **Environmental and Safety Compliance** **Regulatory Status:** - Contains regulated substances - Requires MSDS documentation - Special transportation classification - Controlled waste disposal procedures - Workplace safety measures required **Alternative Options:** - 2011A for similar applications - 6262 for lead-free requirements - 6053 for general purpose uses - 7075 for higher strength needs --- **Conclusion** 2028A Aluminum Alloy represents a refined and improved version of the traditional 2028 alloy, offering manufacturers enhanced mechanical properties and more consistent performance in high-volume production environments. The optimized chemical composition provides superior machinability while maintaining good mechanical strength, making it an excellent choice for precision components requiring complex machining operations. Despite environmental considerations related to its lead content, 2028A continues to deliver outstanding performance in applications where manufacturing efficiency, surface quality, and dimensional accuracy are critical. The alloy's consistent behavior in production environments ensures reliable results for automotive, aerospace, and industrial applications demanding high precision and excellent machinability.

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 1555 gallon liquid totes Special package is available on request.