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APPENDIX B

Typical Hardness of Beryllium Copper Castings - Table 12
ALLOY TEMPER

HEAT TREATMENT

 ROCKWELL HARDNESS
275C C
CT
A
AT		 Solution anneal one hour per inch or fraction of an inch of cross section at 1450 ± 25F followed by immediate water quench.  Age for 3 hrs. at 625 ± 25F. B80-90
C20-25
B80-95
C43-47
245C C
CT
A
AT		 B81-86
C20-25
B70-76
C40-45
20C C
CT
A
AT		 B80-85
C20-24
B65-75
C38-43
165C C
CT
A
AT		 B74-82
C20-24
B46-54
C34-39
10C C
CT
A
AT		 Solution anneal one hour per inch or fraction of an inch of cross section at 1675 ± 25F followed by immediate water quench.  Age for 3 hrs. at 900 ± 25F. B50-60
B65-75
B35-45
B92-100
3C C
CT
A
AT		 B55-65
B75-90
B35-45
B92-100
NOTE:  Properties are typical of precision cast material, while properties of sand castings tend to be closer to the low end of the ranges shown.
Additional information regarding the properties and characteristics of the casting alloys is available in the Brush Wellman publication, Beryllium Copper Casting and Master Alloys.


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