Technical data sheets
Aluminium Alloy | ASTM & FED-QQ
QQ-A-250/12 T651 Plate
A high strength aerospace aluminium alloy with, depending upon temper, Yield Strength of up to 54ksi (370 MPa) and Tensile Strength of up to 67 ksi (460 MPa)
Chemical Composition
|
SAE AMS QQ-A-250/12 Alloy QQ A 250/12 |
|
|---|---|
| Chemical Element | % Present |
| Aluminium (Al) | balance |
| Other (Each) | 0.05 max |
| Others (Total) | 0.15 max |
| Titanium (Ti) | 0.2 max |
| Chromium (Cr) | 0.18 - 0.28 |
| Manganese (Mn) | 0.3 max |
| 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-250/12 has similarities to the following standard designations and specifications but may not be a direct equivalent:
AMS 4044, Alloy 7075, UNS A97075
Temper Types
Alloy QQ-A-250/12 is supplied in a wide range of tempers:
- O
- T351
- T6
- T62
- T651
- T6510
- T73
- T7351
Supplied Forms
Alloy QQ-A-250/12 T651 is supplied in sheet and plate
- Sheet
- Plate
Generic Physical Properties
| Physical Property | Value |
|---|---|
| Density | 2.81 g/cm³ |
| Melting Point | 635 °C |
| Thermal Expansion | 23.5 x10^-6 /K |
| Modulus of Elasticity | 72 GPa |
| Thermal Conductivity | 134-160 W/m.K |
| Electrical Resistivity | 40 % IACS |
Mechanical Properties
The Mechanical Properties given are for Plate in the T651 temper
| Thickness (mm) | Proof Strength (Min) | Tensile Strength (Min) | Elongation % (Min) |
| Over 6.3 up to & incl. 12.6 | 462 | 538 | 9 |
| 12.7 up to & incl. 25.4 | 469 | 538 | 7 |
| Over 25.4 up to & incl. 50.8 | 462 | 531 | 6 |
| Over 50.8 up to & incl. 63.5 | 441 | 524 | 5 |
| Over 63.5 up to & incl. 76.2 | 421 | 496 | 5 |
| Over 76.2 up to & incl. 88.9 | 400 | 490 | 5 |
| Over 88.9 up to & incl. 101.6 | 372 | 462 | 3 |
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Last updated Friday, January 17, 2014
Disclaimer
This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.
Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.
The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.
Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.
As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.
Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.