Resources
Strength in numbers
Aluminium Alloy | ASTM & FED-QQ
QQ-A-250/13 T6 Sheet
Commercial7075 CLAD
A high strength aerospace aluminium alloy
Chemical Composition
|
SAE AMS QQ-A-250/13 Alloy QQ A 250/13 |
|
|---|---|
| Chemical Element | % Present |
| Aluminium (Al) | balance |
| Other (Each) | 0.05 max |
| Others (Total) | 0.15 max |
| Titanium (Ti) | 0.2 max |
| Manganese (Mn) | 0.3 max |
| Chromium (Cr) | 0.18 - 0.35 |
| Silicon (Si) | 0.4 max |
| Iron (Fe) | 0.5 max |
| Copper (Cu) | 1.2 - 2 |
| Magnesium (Mg) | 2.1 - 2.9 |
| Zinc (Zn) | 5.1 - 6.1 |
Alloy Designations
Aluminium alloy QQ-A-250/13 has similarities to the following standard designations and specifications but may not be a direct equivalent:
AMS 4049, AMS4278, Alloy 7075, UNS A97075
Temper Types
Alloy QQ-A-250/13 is supplied in a range of tempers
- T6
- T62
- T651
Supplied Forms
Alloy QQ-A-250/13 is supplied in CLAD sheet and plate
- Sheet
- Plate
Generic Physical Properties
| Physical Property | Value |
|---|---|
| Density | 2.71 g/cm³ |
| Melting Point | 635 °C |
| Thermal Expansion | 23.5 x10^-6 /K |
| Modulus of Elasticity | 72 GPa |
| Thermal Conductivity | 134 W/m.K |
| Electrical Resistivity | 33 % IACS |
Mechanical Properties
These are for clad sheet in the T6 temper
| Thickness (mm) | Proof Strength (Min) | Tensile Strength (Min) | Elongation % (Min) |
| Over 0.3 up to & incl. 0.9 | 414 | 483 | 7 |
| Over 0.9 up to & incl. 1.5 | 427 | 496 | 8 |
| Over 1.6 up to & incl. 4.7 | 434 | 503 | 8 |
