UNS Alloy No. BERYLCO Alloy Composition Weight%
C17000 165 Be
Ni+Co
Ni+Co+Fe
Cu+Be+Ni+Co+Fe
1.6-1.79
0.2 min.
0.6 max.
99.5% min.

C17200 25 Be
Ni+Co
Ni+Co+Fe
Cu+Be+Ni+Co+Fe
1.8-2.0
0.2 min.
0.6 max.
99.5% min.

C17300 33-25 Be
Ni+Co
Ni+Co+Fe
Pb
Cu+Be+Ni+Co+Fe+Pb
1.8-2.0
0.2 min.
0.6 max.
0.2-0.6
99.5% min.

C17500 10 Be
Co
Cu+Be+Ni+Co
0.4-0.7
2.4-2.7
99.5% min.

C17510 14 Be
Ni
Cu+Be+Ni
0.2-0.6
1.4-2.2
99.5% min.