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ABOUT MG DIE CASTING

Magnesium is strong, rigid, fully recyclable, and is the ideal alloy for saving weight when you don’t want to sacrifice durability.
 
Magnesium benefits:
The lightest of all structural metals
Excellent stiffness and strength-to-weight ratio
Outstanding EMI and RFI shielding properties
High conductivity, electrical, and thermal
Withstands high operating temperatures
Cost-effective compared with many engineered thermoplastic materials
High dimensional accuracy and stability
Exceptional thin wall capability
Good environmental corrosion resistance
Good finishing characteristics
Full recyclability
 
Magnesium application:
Almost as light-weight as plastic, magnesium has the advantage of greater strength and rigidity along with inherent EMI/RFI shielding, durability, heat-dissipation, and full recyclability.
 
AZ91D
Alloy AZ91D is the most widely used magnesium die cast alloy and has an excellent combination of mechanical properties, corrosion resistance, and castability.
 
*Corrosion resistance is achieved by enforcing very strict limits on three metallic impurities—iron, copper and nickel. These are limited to very low levels making it necessary to use primary magnesium in the production of this alloy
*As with all magnesium alloys, special precautions must be taken when machining
 
Working with AZ91D
Designers of structural components must be aware of the creep limitations of magnesium alloys—generally with increasing temperature, the tensile strength, yield strength, and hardness of magnesium alloys decreases, while ductility increases
In addition to environmental effects, there is a change in the metallurgical structure of magnesium over a period of time, and/or at elevated temperatures, that affects the mechanical properties
This aging effect arises from the fact that the castings are produced under rapid solidification conditions which don’t allow the alloy to reach equilibrium (effectively, reactions between the alloy constituents have not been completed)
Because creep is an important consideration in magnesium parts for elevated temperature use, stresses and times of operations should be known for both peak and normal conditions.

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