98 



Copper and Copper-base Alloys 



1 10 



too 



90 



^ 80 

 o- 

 <o 

 ^ 70 



Q. 



^ 60 



_j 



S 50 

 o 



" 40 



30 



20 



10 







11.0 20.7 29.4 37.2 44.0 50.0 55.5 60.5 64.8 68.6 

 Percen+ Reduc+ion of Area by Roiling 

 01 2 3456789- 10 

 B and S Numbers Hard 

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

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

 to two different grain sizes, 0.015 and 0.080 mm. (65.19 % copper, 

 1.09 % lead, balance zinc) (0.040-in. stock). 



11.0 20.7 29.4 372 440 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B and S Numbers Hard 

 Chabt 22. — The effect of cold rolling on the Rockwell hardness and 

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

 annealed to two different grain sizes, 0.015 and 0.080 mm. (65.19 % 

 copper, 1.09 % lead, balance zinc) (0.040-in. stock). 



Il.O 20.7 294 37.2 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 1 23456789 10 

 B and S Numbers Hard 



Chart 23. — The effect of cold rolling on the yield strengths of leaded 

 high-brass strip, previously annealed to a grain size of 0.015 mm. 

 (65.19 % copper, 1.09 % lead, balance zinc) (0.040-in. stock). 



90 



00 



JQ 



«,70 

 60 

 50 

 40 

 30 

 20 

 10 



11.0 20.7 294 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 1 23456789 10 

 B and S Numbers Hard 



Chart 24. — The effect of cold rolling on the yield strengths of 

 leaded high-brass strip, previously annealed to a grain size of 0.080 mm. 

 (65.19 % copper, 1.09 % lead, balance zinc) (0.040-in. stock). 



