Aluminum 2124-O
Subcategory: 2000 Series Aluminum Alloy; Aluminum Alloy; Metal; Nonferrous Metal
Close Analogs:
Composition Notes:
A Zr + Ti limit of 0.20 percent maximum may be used with this alloy designation for extruded and forged products only, but only when the supplier or producer and the purchaser have mutually so agreed. Agreement may be indicated, for example, by reference to a standard, by letter, by order note, or other means which allow the Zr + Ti limit.
Aluminum content reported is calculated as remainder.
Composition information provided by the Aluminum Association and is not for design.
Key Words: Aluminium 2124-O; UNS A92124; QQ-A-250/29; ASTM B209; AMS 4101; AA2124-O
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Material Notes:
Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN.
Physical Properties
| Physical Properties | Metric | English | Comments |
| Density | 2.78 g/cc | 0.1 lb/in³ | AA; Typical |
Mechanical Properties
| Modulus of Elasticity | 73 GPa | 10600 ksi | Average of Tension and Compression. In Aluminum alloys, the compressive modulus is typically 2% greater than the tensile modulus |
| Poisson’s Ratio | 0.33 | 0.33 | Estimated from trends in similar Al alloys. |
| Shear Modulus | 27 GPa | 3920 ksi | Estimated from similar Al alloys. |
Electrical Properties
| Electrical Resistivity | 4.2e-006 ohm-cm | 4.2e-006 ohm-cm |
Thermal Properties
| CTE, linear 68°F | 22.9 µm/m-°C | 12.7 µin/in-°F | AA; Typical; Average over 68-212°F range. |
| CTE, linear 250°C | 24.7 µm/m-°C | 13.7 µin/in-°F | Average over the range 20-300ºC |
| Specific Heat Capacity | 0.882 J/g-°C | 0.211 BTU/lb-°F | |
| Thermal Conductivity | 193 W/m-K | 1340 BTU-in/hr-ft²-°F | |
| Melting Point | 502 – 638 °C | 935 – 1180 °F | AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Eutectic melting is not eliminated by homogenization. |
| Solidus | 502 °C | 935 °F | AA; Typical |
| Liquidus | 638 °C | 1180 °F | AA; Typical |
Processing Properties
| Annealing Temperature | 413 °C | 775 °F | |
| Solution Temperature | 493 °C | 920 °F | |
| Aging Temperature | 191 °C | 375 °F |