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AMS QQ-A-250/10 / AlMg3Mn / 5454 / O / H111

Chemical Properties % Value
Silicon (Si)0,00 - 0,25
Chromium (Cr)0,05 - 0,20
Manganese (Mn)0,50 - 1,00
Magnesium (Mg)2,40 - 3,00
Copper (Cu)0,0 - 0,10
Titanium (Ti)0,00 - 0,20
Iron (Fe)0,00 - 0,40
Zinc (Zn)0,00 - 0,25
Aluminium (Al)Balance
Physical Properties Value
Density2,69 g/cm³
Melting Point602 °C
Thermal Expansion23.6 x 10^-6 /K
Modulus of Elasticity70 GPa
Thermal Conductivity130 W/m.K
Electrical Resistivity%34 IACS
Mechanical Properties Value
Proof Strength130
Yield Strength250
Elongation A50 mm%20
Modulus of Elasticity70 GPa
This alloy is primarily used in areas where good formability is required, it is used in O, H112, H32, H34;
to specification ASTM B209 Tempers and is an excellent choice for large pressure vessels and certain marine fabricated products. The formability is at its best in the soft 0 temper, but also sometimes used in H32 or H34 tempers too. However the strength and corrosion resistance are not always as good as other alloys, so as always a marine structural engineer should be consulted for each application.


Aluminium alloy AMS QQ-A-250/10, 5454 has s imilarities to the following standard designations and specifications ;

Alloy 5454, UNS A95454, ASTM B209

ISO AlMg3MnAMS QQ-A-250/10

3.3537, BS N51
5454 is supplied in a wide range of tempers:
  • O - Soft
  • H112 - Slightly strain-hardened from working at an elevated temperature from a limited amount of cold work (mechanical property limits specified).
  • H22 - Work hardened by rolling then annealed to quarter hard
  • H32 - Work hardened by rolling then stabilised by low-temperature heat treatment to quarter hard
  • 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


5454 is supplied in plate, strip, bar, tube and sheet
  • Plate
  • Sheet
  • Strip