The Brasses 



85 



CM«3 

 C — 



c 

 9S. 



- 0) 

 C c 



o-o 



to 80 



70 



60 



50 



c= 40 



^ 50 



o 



CD 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg. F. flHn a + Temp.) 



Chart 179. — The effect of annealing on the Rockwell hardness, 

 percentage elongation in 2 in., and grain size of Muntz metal (60.80 % 

 copper) tube, previously cold-drawn 50 per cent (reduction of area) 

 from a grain size of 0.020 mm. 



200 400 600 800 1000 1200 



Tempera-fure, Deg. F ( 1 Hr a\ Temp.) 



Chart 180. — The effect of elevated temperature on the Izod- 

 impact strength of previously annealed Muntz metal (61.00 % copper) 

 according to D. Bunting.*^' 



70 



60 



50 



. 40 



it 

 ■o 30 



20 



10 



50 



40 



30 



o 20 







200 400 600 800 1000 1200 

 Temperature, Deg. F. (IHr. a+ Temp.) 



200 400 600 800 1000 1200 



Temperature, Deg. F. (IHn at Ternp.) 



Chart lSl.--The effect of elevated temperature on the Izod- Chart 182.— The effect of elevated temperature on the Izod- 



previously annealed 58 % copper-zinc alloy impact strength of a previously annealed 52 % copper-zinc alloy 



according to D. Bunting.*'' 



impact strength of 

 according to D. Bunting. 



