2A12 T4 Aircraft Aluminum Sheet / High Strength Aluminium Flat Plate 2A12 is primarily alloyed with copper. It also contains manganese and magnesium and can sometimes contain smaller amounts of silicon, iron, chromium, zinc and/or titanium. 2024 alloy is often chosen for applications that require high strength Characteristics On 2A12-T4 Aluminum Sheets / Plates Thermal Conductivity: 151 W/m-K | 1050 BTU-in/hr-ft²-°F Coefficient of Thermal Expansion @ 20.0 - 100 °C Temp: 23.2