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Strength in numbers
Aluminium Alloy | ASTM & FED-QQ
QQ-A-200/3 T8511 Bar
Commercial2024
A high strength alloy with, dependent upon temper, minimum Proof Stress up to 56 ksi / 385 Mpa and minimum Tensile Strength up to 70 ksi / 482 MPa
Chemical Composition
|
SAE AMS QQ-A-200/3 Alloy QQ-A-200/3 |
|
|---|---|
| Chemical Element | % Present |
| Aluminium (Al) | balance |
| Other (Each) | 0.05 max |
| Chromium (Cr) | 0.1 max |
| Titanium (Ti) | 0.15 max |
| Others (Total) | 0.15 max |
| Zinc (Zn) | 0.25 max |
| Silicon (Si) | 0.5 max |
| Iron (Fe) | 0.5 max |
| Manganese (Mn) | 0.3 - 0.9 |
| Magnesium (Mg) | 1.2 - 1.8 |
| Copper (Cu) | 3.8 - 4.9 |
Alloy Designations
Aluminium alloy QQ-A-200/3 has similarities to the following standard designations and specifications:
AMS 4164, AMS 4165
Temper Types
Alloy QQ-A-200/3 is supplied in a range of tempers:
- T3
- T8511
- T3511
Supplied Forms
Alloy QQ-A-200/3 is supplied as Extruded Bar
- Bar
- Extrusions
Generic Physical Properties
| Physical Property | Value |
|---|---|
| Density | 2.74 g/cm³ |
| Melting Point | 640 °C |
| Thermal Expansion | 23.1 x10^-6 /K |
| Modulus of Elasticity | 73 GPa |
| Thermal Conductivity | 121 W/m.K |
| Electrical Resistivity | 30 % IACS |
Mechanical Properties
These values apply to QQ-A-200/3 bar in the T8511 temper
| Diameter (mm) | Proof Strength (Min) | Tensile Strength (Min) | Elongation % (Min) |
| Up to & incl. 6.25mm | 386 | 441 | 4 |
| Over 6.3mm up to & incl. 38mm | 400 | 455 | 5 |
| Over 38mm | 400 | 455 | 5 |
