42 



Coppei' and Copper-base Alloys 



11.0 20.7 29.4 372 44.0 50.0 55.5 605 64.8 68.6 

 Percent Reduction of Area by Rolling 

 I 2 3 4 5 6 7 8 9 10 



BSS Numbers Hard 

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

 apparent elastic limit of rich low-brass strip, previously annealed to 

 two different grain sizes, 0.015 and 0.070 mm. (85.42 % copper) (0.040- 

 in. stock). 







Chakt 



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 Rolling 

 01. 2 345 6789 10 

 BSS Numbers Hard 



Chart 37. — The effect of cold rolling on the Rockwell hardness and 

 percentage elongation in 2 in. of rich low-brass strip, previously- 

 annealed to two different grain sizes, 0.015 and 0.070 mm. (85.42 % 

 copper) (0.040-in. stock). 



80 



70 



60 



50 



i; 40 



Q. 



•g 30 



o 

 I 20 



to 



11.0 207 29.4 372 44.0 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 01234 56789 10 

 OS'S Numbers Hard 



Chart 38. — The effect of cold rolling on the yield strengths of rich 

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

 (85.42 % copper) (0.040-in. stock). 



11.0 20.7 29.4 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 2 '3 456789 10 

 BSS Numbers Hard 



Chart 39. — The effect of cold rolling on the yield strengths of rich 

 low-brass strip, previously annealed to a grain size of 0.070 mm. 

 (85.42% copper) (0.040-in. stock). 



