24 July 2021 7000 Series Aluminum Alloy
7005 Aluminum Alloy Plate
7005 is an aluminium wrought alloy used in bicycle frames , due to its relative ease of welding it does not require expensive heat treating - it is however harder to form making manufacture more challenging. It has an Ultimate Tensile Strength of 350 MPa, a Fatigue Strength of 150 MPa and a density of 2.78 g/cm³. It does not need to be precipitation hardened, but can be cooled in air.
7005 aluminum alloy is an American deformed aluminum alloy. The strength of 7005 aluminum alloy is higher than that of 7003 aluminum alloy. It has good welding performance and can be strengthened by heat treatment. 7005 aluminum alloy is an extruded material. It is often used in the manufacture of welded structures that require both high strength and high fracture toughness, such as trusses, rods, and containers of transportation vehicles; large heat exchangers, and cannot be welded. The parts that undergo solid solution treatment; can also be used to make sports equipment such as tennis rackets and softball bats.
Chemical Composition:
| Chemical Element | Metric | English | Comments |
|---|---|---|---|
| Aluminum, Al | 91 - 94.7 % | 91 - 94.7 % | As remainder |
| Chromium, Cr | 0.06 - 0.20 % | 0.06 - 0.20 % | |
| Copper, Cu | <= 0.10 % | <= 0.10 % | |
| Iron, Fe | <= 0.40 % | <= 0.40 % | |
| Magnesium, Mg | 1.0 - 1.8 % | 1.0 - 1.8 % | |
| Manganese, Mn | 0.20 - 0.70 % | 0.20 - 0.70 % | |
| Other, each | <= 0.05 % | <= 0.05 % | |
| Other, total | <= 0.15 % | <= 0.15 % | |
| Silicon, Si | <= 0.35 % | <= 0.35 % | |
| Titanium, Ti | 0.01 - 0.06 % | 0.01 - 0.06 % | |
| Zinc, Zn | 4.0 - 5.0 % | 4.0 - 5.0 % | |
| Zirconium, Zr | 0.08 - 0.20 % | 0.08 - 0.20 % |
Mechanical Properties:
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Brinell | 94 | 94 | 500 kg load with 10 mm ball. Calculated value. |
| Hardness, Knoop | 119 | 119 | Converted from Brinell Hardness Value |
| Hardness, Rockwell A | 39.5 | 39.5 | Converted from Brinell Hardness Value |
| Hardness, Rockwell B | 59 | 59 | Converted from Brinell Hardness Value |
| Hardness, Vickers | 106 | 106 | Converted from Brinell Hardness Value |
| Tensile Strength, Ultimate | 350 MPa | 50800 psi | |
| Tensile Strength, Yield | 290 MPa | 42100 psi | |
| Elongation at Break | 13 % @Thickness 1.60 mm | 13 % @Thickness 0.0630 in | In 5 cm |
| Modulus of Elasticity | 72.0 GPa | 10400 ksi | Average of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus |
| Poissons Ratio | 0.33 | 0.33 | Estimated from trends in similar Al alloys. |
| Fatigue Strength | 150 MPa @# of Cycles 5.00e+8 | 21800 psi @# of Cycles 5.00e+8 | |
| Shear Modulus | 26.9 GPa | 3900 ksi | |
| Shear Strength | 215 MPa | 31200 psi |
Thermal Properties:
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 21.4 µm/m-°C @Temperature -50.0 - 20.0 °C | 11.9 µin/in-°F @Temperature -58.0 - 68.0 °F | |
| 23.1 µm/m-°C @Temperature 20.0 - 100 °C | 12.8 µin/in-°F @Temperature 68.0 - 212 °F | ||
| 23.6 µm/m-°C @Temperature 20.0 - 100 °C | 13.1 µin/in-°F @Temperature 68.0 - 212 °F | ||
| 24.0 µm/m-°C @Temperature 20.0 - 200 °C | 13.3 µin/in-°F @Temperature 68.0 - 392 °F | ||
| 25.0 µm/m-°C @Temperature 20.0 - 300 °C | 13.9 µin/in-°F @Temperature 68.0 - 572 °F | ||
| Specific Heat Capacity | 0.875 J/g-°C | 0.209 BTU/lb-°F | |
| Thermal Conductivity | 137 W/m-K | 951 BTU-in/hr-ft²-°F | |
| Melting Point | 607 - 643 °C | 1120 - 1190 °F | |
| Solidus | 607 °C | 1120 °F | |
| Liquidus | 643 °C | 1190 °F |
Process Properties:
| Processing Properties | Metric | English | Comments |
|---|---|---|---|
| Annealing Temperature | 343 °C | 650 °F | |
| Solution Temperature | 399 °C | 750 °F |