QQ-A-250/12 T651 Plate data sheet

Aluminium Alloy | ASTM & FED-QQ

QQ-A-250/12 T651 Plate

Commercial7075

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

'Typical' Physical Properties are given
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 17 January 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.

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Aluminium Alloy | ASTM & FED-QQ