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Aluminum Casting Specifications

Aluminium Alloys

Investment Castings
BS1490
LM6
LM25

Gravity Die Castings
BS1490
LM6
LM25

Can be broken down into 8 groups with the first digit of a 4 digit number, showing the major element IE-

1*** Pure
2*** Copper is the main element
3*** Manganese is the main element
4*** Silicon is the main element
5*** Magnesium is the main element

6*** Magnesium and Silicon are the main alloying elements
7*** Zinc is the main alloy but copper, Magnesium, Chrome and Zirconium may be added
8*** Elements such as Tin and Lithium may be added

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