The Brasses 



87 



400 800 1200 1600 2000 



Tempera+ure, Deg. R (1 Hr. a+ Temp.) 



Chart 187. — The effect of elevated temperature on the resistance 

 to compression of copper-zinc alloys according to Doernickel and 

 Trockkels.*'^'" 



60 70 80 90 



Percentage of Copper 



Chart 188. — The effect of chemical composition on the resistance 

 to compression of copper-zinc alloys at various temperatures according 

 to Doernickel and Trockkels. ''''■" 



2400 



?000 



1600 



>1200 



800 



400 



400 8 00 1200 1600 2000 



Tempera+ure, Deg. F. flHr. a+Temp.) 



Chart 189. — The effect of elevated temperature on the resistance 

 to compression of copper-zinc alloys according to Doernickel and 

 Trockkels.<"'9' 



200 400 600 800 1000 1200 1400 1600 



Temperature, Deg. F ( 1 Hr. at Temp.) 



Chart 190. — The effect of elevated temperature on the BrineU hard- 

 ness of two copper-zinc alloys according to Edwards and Herbert.'^*"' 

 (A — 70.63 % copper; C — 60.88 % popper.) 



