The Leaded Brasses 



113 



1 1.0 20.7 29.4 37.2 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by l?otHnq 

 01 2 345 6789 10 

 BSS Nunnbers Hard 



Chabt 70. — The effect of cold rolling on the tensile strength and 

 apparent elastic limit of leaded-brass strip, previously annealed to 

 two different grain sizes, 0.015 and 0.035 mm. (60.96 % copper, 1.53 % 

 lead, balance zinc) {0.040-in. stock). 



110 

 100 

 90 

 80 

 70 

 60 

 50 

 40 

 50 

 20 

 10 



11.0 20.7 294 372 440 50.0 55.5 605 64.8 6a6 

 Percent Peduc+ion of Area by Polling 

 01 23456789 10 

 B&S Numbers Hard 



Chart 71. — The effect of cold rolling on the Rockwell hardness and 

 percentage elongation in 2 in. of leaded-brass strip, previously annealed 

 to two different grain sizes, 0.015 and 0.035 mm. (60.96 % copper. 

 1.53 % lead, balance zinc) (0.040-in. stock). 



11.0 20.7 29.4 372 440 50.0 55.5 605 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B5S Numbers Hard 



Chabt 72. — The effect of cold rolling on the yield strengths of leaded- 

 brass strip, previously annealed to a grain size of 0.015 mm. (60.96 % 

 copper, 1.53 % lead, balance zinc) (0.040-in. stock). 



11.0 207 29.4 372 44.0 500 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B&S Numbers Hard 

 Chart 73. — The effect of cold rolling on the yield strengths of 

 leaded-brass strip, previously annealed to a grain size of 0.035 mm. 

 (60.96 % copper, 1.53 % lead, balance zinc) (0.040-ui. stock). 



