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MAGNESIUM ALLOYS
ALUMINUM
ALLOYS
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Magnesium has
the strength of Aluminum yet weighs one third less which makes it
an obvious candidate for use by automotive and aerospace engineers
concerned with weight reduction.
Magnesium die castings are currently being
used throughout the automobile industry, however items which are
impractical to produce as die castings are not being considered
of developed as magnesium parts. The technology is now available
to produce magnesium castings by sand, permanent mold, or foam casting
techniques in the quantities required by automotive markets.
MAGNESIUM ALLOYS FOR CONSIDERATION IN AUTOMOTIVE
APPLICATIONS
The part application will dictate the use
of either of two magnesium alloys.
HIGH PURITY AZ91 - The heavy metals
iron, nickel, and copper have been reduced to minimal levels creating
a highly corrosion resistant magnesium alloy. This alloy
is made up of Aluminum and Zinc concentrations of 9% and 1%
respectively, with the remainder being Magnesium. |
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It's strength is comparable to aluminum alloy castings
and it maintains this strength throughout all services.
ZE41A - This is a premium strength
alloy made up of Rare Earths, Zirconium, and Zinc in concentrations
of 1.25%, 1%, and 4% respectively, with the remainder being Magnesium.
This alloy will maintain its strength up to approximately 204 degrees
Celsius and will have excellent mechanical properties throughout
the casting that meet or exceed the separately cast test bar requirements.
This alloy is so pressure tight that impregnation is of no value.
High
Volume Production of Magnesium Alloy Castings.
Dale E. McCoy
The A.C. Williams Company
1986 Society of Automotive Engineers,
Inc.
MAGNESIUM CASTINGS
ALUMINUM CASTINGS |
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