Aluminium Alloy - ASTM & FED-QQ - QQ-A-250/30 T851 Plate

QQ-A-250/30 T851 Plate

An alloy developed for elevated temperature strength that has good weldability and resistance to stress corrosion.

Chemical Composition

Spec: SAE AMS QQ A 250/30

Alloy QQ A 250/30

Chemical Element % Present
Silicon (Si) 0.0 - 0.20
Iron (Fe) 0.0 - 0.30
Copper (Cu) 5.80 - 6.80
Manganese (Mn) 0.20 - 0.40
Magnesium (Mg) 0.0 - 0.02
Zinc (Zn) 0.0 - 0.10
Titanium (Ti) 0.02 - 0.10
Other (Each) 0.0 - 0.05
Others (Total) 0.0 - 0.15
Zirconium (Zr) 0.10 - 0.25
Vanadium (V) 0.05 - 0.15
Aluminium (Al) Balance

Temper Types

AMS QQ-A-250/30 Plate is supplied in T851 temper

  • T851 - Solution heat treated then stress relieved by stretching then artificially aged.

Supplied Forms

Alloy AMS QQ-A-250/30 T851 is supplied as Plate

  • Plate

Mechanical Properties

These Mechanical Properties apply to Plate in the T851 condition

Thickness (mm)Proof Strength (Min)Tensile Strength (Min)Elongation % (Min)
Over 6.3 up to & incl. 25.43174278
Over 25.4 up to & incl. 50.83174277
Over 50.8 up to & incl. 76.23174276
Over 76.2 up to & incl. 101.63034135
Over 101.6 up to & incl. 1272964065
Over 127 up to & incl. 152.4 2893934
Download PDF Version

Datasheet Search

Last Datasheet Revision

18 December 2013


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.