The Special Brasses 



183 





50 



40 



2. 30 

 20 

 10 







11.0 20.7 29.4 37.2 440 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 OIZ3456789 10 

 BS(S Numbers Hard 

 Chart 18. — The effect of cold rolling on the yield strengths of 

 silicon-brass No. 2 strip, previously annealed to a grain size of 0.015 mm. 

 (72.36% copper, 0.47 % silicon, balance zinc) (0.040-in. stock). 



100 



90 



80 



^ 70 



■^ 60 



OJ 



D- 50 

 .0 



o 4-0 

 o 

 o 

 -^ 30 



20 



10 







11.0 20.7 29.4 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Polling- 

 01 23456 7 89 10 

 B&S Numbers Hard 

 Chart 19. — The effect of cold rolling on this yield strengths of 

 silicon-brass No. 2 strip, previously annealed to a grain size of 0.080 mm. 

 (72.36 % copper, 0.47 % silicon, balance zinc) (0.040-in. stock). 



0.120 



0.100 



0.080 



Q060 



0040 



0.020 



1300 



700 800 900 1000 1100 1200 



Annealing Temp, in Deg. F. ( IHr. at Temp.) 



CH.4.KT 20. — The effect of annealing on the grain-growing character- 

 istics of silicon-brass No. 2 strip, previously oold-roUed 6 B. & S. Nos. 

 (50 per cent reduction of area) from two different grain sizes, 0.015 

 and 0.080 mm. (72.36 % copper, 0.47 % silicon, balance zinc) (0.040-in. 

 stock) . 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.R (IHnat Temp.) 



Chart 21. — The effect of annealing on the tensile strength and 

 apparent elastic limit of silicon-brass No. 2 strip, previously cold- 

 roUed 6 B. & S. Nos. (50 per cent reduction of area) from two different 

 grain sizes, 0.015 and 0.080 mm. (72.36 % copper, 0.47 % silicon, 

 balance zinc) (0.040-in. stock). 



