|
Common
Magnesium Alloys
|
|
Alloy
Designation
|
Alloying
Additives
|
Uses
|
Reasons
for use
|
|
AZ91
|
9.0
% Al 0.7 % Zn 0.13 % Mn
|
General
casting alloy
|
Good
castability, good mechanical properties
at T<150ºC. |
|
AM60
|
6.0
% Al 0.15% Mn
|
High
pressure die casting alloy
|
Greater
toughness and ductility than AZ91,
slightly lower strength. Often preferred
for automotive structural applications.
|
|
AZ31
|
3.0
% Al 1.0 % Zn 0.2 % Mn
|
Wrought
magnesium products
|
Good
extrusion alloy. |
|
ZE41
|
4.2
% Zn 1.2 % RE 0.7 % Zr
|
Specialist
casting alloy
|
Rare
earth addition improves creep strength
at elevated temperatures. Pressure
tight. |
|
AS41
|
4.2
% Al 1.0 % Si
|
General
casting alloy
|
Better
creep resistance than AZ91 at elevated
temperatures but lower strength.
|
For critical low weight applications,
alloys can be used that contain zirconium,
expensive rare earths and even silver. Alloy
development remains a strong area for research,
particularly with a view to improving the
corrosion resistance and high temperature
creep resistance of cast components.
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