Element

Range, %

Aluminum

 0.05  to 0.30

Beryllium

97.5   to 100 

Beryllium Oxide

 0.3   to 3   

Carbon

 0.05  to 0.30

Copper

 0.005 to 0.10

Chromium

 0.005 to 0.10

Iron

 0.05  to 0.30

Magnesium

 0.02  to 0.15

Nickel

 0.005 to 0.10

Silicon

 0.02  to 0.15