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AMS QQ-A-250/10 / AlMg3Mn / 5454 / H22 / H32

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 Point645 °C
Thermal Expansion23.6 x10^-6 /K
Modulus of Elasticity70.5 GPa
Thermal Conductivity135 W/m.K
Electrical Resistivity%34 IACS
Mechanical Properties Value
Proof Strength94
Yield Strength280
Elongation A50 mm%16
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
  • H111 - Annealed and slightly strain-hardened (less than H11) during subsequent operations such as stretching or levelling.
  • H112 - Slightly strain-hardened from working at an elevated temperature from a limited amount of cold work (mechanical property limits specified).
  • 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
  • H36 - Strain-hardened and stabilized - 3/4 hard.
  • H38 - Strain-hardened and stabilized - 4/4 hard (fully hardened)


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