7075-O Aluminum
7075-O aluminum, supplied by GNEE, typically offers a tensile strength of about 280 MPa and a yield strength of approximately 140 MPa. Its elongation generally falls within the 9–10% range, indicating the alloy's ability to stretch before failure. In the annealed (O) condition, 7075 aluminum demonstrates excellent corrosion resistance and a strength level that is widely regarded as adequate for many manufacturing applications.
Elongation values may vary depending on material thickness. For example, 7075-O aluminum with a thickness of 1.59 mm can achieve elongation of up to 17%, while material with a 12.7 mm diameter typically reaches a maximum elongation of around 16%. The alloy also exhibits a shear modulus of 26.9 GPa and a shear strength of approximately 152 MPa.
From a thermal and electrical standpoint, 7075-O aluminum has an electrical resistivity of about 0.00000380 ohm·cm and a specific heat capacity of 0.96 J/g·°C. Its annealing temperature is approximately 413°C, while the solution heat-treatment temperature generally ranges between 466 and 482°C. With a thermal conductivity of around 173 W/m·K, the alloy maintains good heat-transfer performance.
Aluminum is the primary element in 7075-O, with smaller additions of zinc, chromium, copper, magnesium, iron, manganese, and other trace elements that contribute to its mechanical and physical properties.
2024-O Aluminum
2024-O aluminum, also available from GNEE, consists primarily of aluminum alloyed with elements such as copper, magnesium, chromium, iron, and manganese, along with trace elements present in very small quantities.
In the O temper, 2024 aluminum provides a yield strength of approximately 75.8 MPa and an ultimate tensile strength of about 186 MPa. For material with a thickness of 1.6 mm, elongation at break is around 20%, while thicker material measuring 12.7 mm can reach elongation values of up to 22%. The alloy typically exhibits machinability of about 30% and a fatigue strength of approximately 89.6 MPa.
The shear modulus of 2024-O aluminum is roughly 28 GPa, with a shear strength of about 124 MPa. Its melting range lies between 502 and 638°C, and it offers relatively high thermal conductivity of approximately 193 W/m·K. In addition, the alloy has an annealing temperature of about 413°C and a solution heat-treatment temperature near 256°C.
Aerospace Applications for 2024 and 7075 Aluminum Alloys
Applications for 2024 Airplane Aluminum Alloys
Aircraft Structure: Used in load-bearing structures like the fuselage, wing beams, and wing skins.
Military Aviation: Commonly utilized in high-demand aircraft like fighter jets and cargo planes.
Applications for 7075 aircraft aluminum alloys
Structural Components: The 7075 aluminum alloy is commonly used in aerospace structural components like as wings, fuselage frames, and landing gear.
Military Aviation: Especially ideal for military aircraft that require strong strength and light weight.
