104 



Copper and Copper-base Alloys 



110 

 100 

 90 

 80 



-. 70 

 cr 



u 60 



s^ 50 



_i 



§ 40 

 o 



30 



20 

 10 



II.O 20.7 29,4 372 44.0 50,0 55.5 60.5 64,8 68.6 

 Percent Reduction of Area by Rolling 

 01 2345 6789 10 

 BSS Numbers Hard 

 Chart 41. — 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 O.OSO mm. (63.35 % copper, 2.79 % lead, 

 balance zinc) (0.040-in. stock). 



o no 



100 



90 



70 



D 60 



cQ 



? 50 



^ 



w 40 



30 



_ 20 



11,0 20.7 29.4 37.2 440 50.0 55.5 60.5 648 68.6 

 Percent Reduc+ion of Area by Rolling 

 01 23456 789 10 

 B&S Numbers Hard 



Ch.irt 42. — 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 0.080 mm. (63.35 % copper, 

 2.79 % lead, balance zinc) (0.040-in. stock). 



11.0 207 294 372 44.0 50.0 555 60.5 648 68.6 

 Percenf Reduction of Area by Rolling 

 01 23 456789 10 

 B&5 Numbers Hard 



Chart 43. — The effect of cold rolling on the yield strengths of 

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

 (63.35 % copper, 2.79 % lead, balance zinc) (0.040-in. stock). 



90 



80 



. 70 



cr 60 



I/O 



^50 



jS 



-■ 40 

 o 

 o 

 ° 30 



20 



10 



11.0 20.7 29.4 372 440 500 55.5 6Q5 64.8 68.6 

 Percenf Reduction of Area by Rolling 

 01 2 3456789 10 

 B&S Numbers Hard 



Chart 44. — The effect of cold rolling on the yield strengths of leaded- 

 brass strip, previously annealed to a grain size of O.OSO mm. (63.35 % 

 copper, 2.79 % lead, balance zinc) (0.040-in. stock). 



