Aluminium Alloy - ASTM & FED-QQ - QQ-A-250/8 H34 Sheet

QQ-A-250/8 H34 Sheet

A medium strength alloy

Chemical Composition

Spec: SAE AMS QQ A 250/8

Alloy QQ A 250/8

Chemical Element % Present
Silicon (Si) 0.0 - 0.25
Iron (Fe) 0.0 - 0.40
Copper (Cu) 0.0 - 0.10
Manganese (Mn) 0.0 - 0.10
Others (Total) 0.0 - 0.15
Magnesium (Mg) 2.20 - 2.80
Zinc (Zn) 0.0 - 0.10
Other (Each) 0.0 - 0.05
Chromium (Cr) 0.15 - 0.35
Aluminium (Al) Balance


Physical PropertyValue
Density 2.63 g/cm³
Melting Point 650 °C
Thermal Expansion 23.7 x10^-6 /K
Modulus of Elasticity 70 GPa
Thermal Conductivity 138 W/m.K
Electrical Resistivity 35 % IACS

Alloy Designations

Aluminium alloy QQ-A-250/8 has similarities to the following standard designations and specifications but may not be a direct equivalent:

Alloy 5052, UNS A95052, AA5052



Temper Types

Alloy QQ-A-250/8 is supplied in a wide range of tempers

  • O - Soft
  • H34 - Stabilised - A low temperature thermal treatment or heat introduced during manufacture which stabilises the mechanical properties and relieves residual internal stress, plus usually improves ductility
  • H112 - Alloys that have some tempering from shaping but do not have special control over the amount of work-hardening or thermal treatment.
  • H24 - Work hardened by rolling then annealed to half hard
  • H26 - Work hardened by rolling then annealed to three-quarter hard
  • H32 - Work hardened by rolling then stabilised by low-temperature heat treatment to quarter hard
  • T36 - Solution heat treated then cold worked by a reduction of 6%

Supplied Forms

Alloy QQ-A-250/8 is supplied in plate and sheet

  • Plate
  • Sheet

Mechanical Properties

Mechanical Properties shown are for H34 temper

Thickness (mm)Proof Strength (Min)Tensile Strength (MAX)Elongation % (Min)
Over 0.2 up to & incl. 0.52342833
Over 0.5 up to & incl. 1.22342834
Over 1.2 up to & incl. 2.92342836
Over 2.9 up to & incl. 6.32342837
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Last Datasheet Revision

17 January 2014


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.