2028 Aluminum alloy,Aluminum 2028 alloy,E FORU

### **Aluminum 2028 Alloy Product Introduction** **Overview** 2028 Aluminum Alloy is a high-strength aluminum-copper based alloy specifically designed for superior machinability and excellent mechanical properties. It belongs to the family of free-machining aluminum alloys and is particularly suitable for automatic screw machine operations and high-volume production of precision components. --- #### **1. Chemical Composition** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.0 - 4.0 | | **Silicon (Si)** | 0.8 - 1.5 | | **Iron (Fe)** | ≤ 0.7 | | **Manganese (Mn)** | 0.20 - 0.6 | | **Magnesium (Mg)** | 0.40 - 0.8 | | **Zinc (Zn)** | ≤ 0.5 | | **Lead (Pb)** | 0.8 - 1.5 | | **Bismuth (Bi)** | 0.4 - 0.8 | | **Other Elements** | ≤ 0.15 total | --- #### **2. Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 2.87 g/cm³ (0.104 lb/in³) | | **Melting Range** | 515°C - 640°C (959°F - 1184°F) | | **Electrical Conductivity** | 35-40% IACS | | **Thermal Conductivity** | 135-145 W/m·K | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 70.0 GPa (10,150 ksi) | | **Poisson's Ratio** | 0.33 | --- #### **3. Mechanical Properties** **Typical Mechanical Properties (T6 Temper):** | Property | Value | |----------|-------| | **Tensile Strength** | 330-380 MPa (48-55 ksi) | | **Yield Strength (0.2% Offset)** | 240-290 MPa (35-42 ksi) | | **Elongation in 2 inches** | 8-12% | | **Shear Strength** | 200-240 MPa (29-35 ksi) | | **Fatigue Strength** | 115 MPa (17 ksi) | | **Brinell Hardness** | 95-105 HB | | **Machinability Rating** | Excellent (98% of free-cutting brass) | --- #### **4. International Standards** | Standard System | Designation | Product Form | |-----------------|-------------|--------------| | **ASTM** | ASTM B211 | Rod, Bar | | **SAE** | SAE J454 | Wire, Rod | | **UNS** | A92028 | - | | **EN** | EN AW-2028 | Extruded Products | --- #### **5. Product Applications** **Automotive Industry:** - Fuel system components - Transmission shafts and gears - Engine mounting brackets - Suspension components - Electrical system parts **Aerospace Applications:** - Non-structural aircraft fittings - Instrumentation components - Control linkage parts - Avionics mounting hardware - Electrical connectors **Industrial Applications:** - High-volume screw machine products - Valve bodies and stems - Pump components - Hydraulic system parts - Machinery components **Consumer Products:** - Precision instrument parts - Camera mechanisms - Lock components - Hardware fittings - Electronic enclosures --- #### **6. Key Advantages & Considerations** **Advantages:** - ✅ **Outstanding Machinability** - among the best in aluminum alloys - ✅ **Superior Chip Formation** - produces small, broken chips - ✅ **Excellent Surface Finish** - reduces need for secondary operations - ✅ **Good Mechanical Strength** for demanding applications - ✅ **High Production Efficiency** on automatic machines - ✅ **Extended Tool Life** - reduces manufacturing costs **Considerations:** - ⚠️ **High Lead Content** - not environmentally compliant - ⚠️ **Limited Corrosion Resistance** - requires protective coatings - ⚠️ **Not Weldable** - due to lead content - ⚠️ **Special Handling Required** for lead-containing material - ⚠️ **Restricted Applications** due to environmental regulations --- **Heat Treatment Characteristics** **Available Tempers:** - O: Annealed (maximum formability) - T4: Solution heat-treated and naturally aged - T6: Solution heat-treated and artificially aged **Typical T6 Heat Treatment:** - Solution Treatment: 500-510°C (932-950°F) - Quenching: Water quench - Artificial Aging: 150-160°C (302-320°F) for 6-10 hours --- **Machining Performance** **Machinability:** Excellent (rated 98% of free-cutting brass) **Cutting Speed:** Very high speeds achievable **Tool Wear:** Minimal due to chip-breaking properties **Surface Quality:** Superior finish with standard tools **Chip Control:** Excellent - ideal for automated operations --- **Environmental and Regulatory Information** **Compliance Notes:** - Contains significant lead content - Not RoHS compliant - Restricted in electrical/electronic applications - Requires proper material safety documentation - Special disposal procedures required **Alternative Materials:** - 2011 alloy for similar machinability - 6262 alloy for lead-free applications - 6053 alloy for general purpose uses --- **Quality Assurance** **Testing Requirements:** - Chemical composition verification - Mechanical property testing - Machinability performance tests - Surface quality inspection - Dimensional accuracy verification --- **Conclusion** 2028 Aluminum Alloy represents one of the highest levels of machinability available in aluminum alloys, making it particularly valuable for high-volume production of precision components. The optimized combination of lead and bismuth provides exceptional chip-breaking characteristics that maximize production efficiency on automatic screw machines and CNC equipment. While environmental regulations limit its application in certain markets, its superior machining performance continues to make it a preferred choice for automotive, industrial, and precision mechanical components where manufacturing efficiency and surface quality are paramount. The alloy demonstrates excellent performance in applications requiring complex machining operations and tight tolerances, providing economic advantages through reduced machining time and extended tool life.

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 1554 gallon liquid totes Special package is available on request.