Aluminum 3xxx Alloys
Manganese in the range from 1 to 2 % is the main alloying element in alloys of the 3xxx series. He gives these alloys plasticity, that provides them with good formability, and a wide range of mechanical properties in different states of cold-worked. These alloys have higher strength properties, than 1xxx series alloys, especially at elevated temperatures.
“beer” Aluminium alloy
The most typical application is the body "Beer" banks alloy 3004 due to its good moldability during forming, roll forming and landing. These alloys are used in other types of packaging, for the manufacture of facing sheets, kitchen utensils - everywhere, where a combination of strength required, formability, weldability, anodized and corrosion resistance.
The role of manganese in the aluminum alloy
The fine dispersoids manganese stabilize grain growth during high temperature annealing, which gives strength and formability. Manganese provides ductility, and in combination with iron it improves castability and alloys reduces shrinkage during metal solidification. a content 2 % Manganese increases the strength and hardness, but less effective, than copper or magnesium.
The solid solution of manganese in aluminum
In some alloys, for example, in the same 3004, to the strengthening effect of alloying with manganese added to the effect of doping with magnesium in concentrations of 0,8 to 1,3 %. This gives further solid solution strengthening.
The role of iron in the aluminum-manganese alloys
Iron in small quantities provides a polishing effect in deep landing operations.
Aluminum-manganese alloys in the standards
The European standard EN 573-3 It includes 13 3xxx series alloys and modifications thereof, GOST 4784-97 – 4.
See. – The mechanical properties of aluminum alloys, including – 3003, 3004 and 3105.