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Strength in numbers

Aluminium Alloy   |   ASTM & FED-QQ

QQ-A-250/12 '0' Sheet

Commercial7075 BARE

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

Supplied Forms

Alloy QQ-A-250/12 is supplied in 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 175 W/m.K
Electrical Resistivity 45.5 % IACS

Mechanical Properties

SAE AMS QQ-A-250/12
Sheet - Up to 12.67mm
Mechanical Property Value
Proof Stress 145 Min MPa
Tensile Strength 276 Min MPa
Elongation A50 mm 10 Min %

Mechanical Properties shown are for '0' temper sheet in thicknesses 0.3mm to 12.6mm