70 



Copper and Copper-base Alloys 



no 



100 



90 



80 



c 70 



a* 

 ^ 60 



<^5Q 



40 



^-30 



20 



11.0 20.7 29.4 372 44.0 500 5b5 60.5 64.8 68.6 

 Percen+ Reduc+ion o-f Area by Cold Working 

 0123456789 10 

 B&S Numbers Hard 



Chart 127. — The effect of cold rolling on the tensile strength and 

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

 to two different grain sizes, 0.015 and 0.070 mm. (66.49 % copper) 

 (0.040-in. stock). 



^i^llO 

 2 100 



CD 



90 



.E^ 



: 's> 



01 ' 



60 



a. DQ 

 c':g 50 



i> 40 

 IP c 

 CTS 



° ^ 30 



liJX 



= 20 



11.0 20.7 29.4 372 44.0 50.0 555 6Q5 64.8 68.6 

 Percent Reduction of Area by Cold Working 

 O'l 23456789 10 

 B5(S Numbers Hard 



Chart 128. — The effect of cold rolling on the Rockwell hardness and 

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

 annealed to two different grain sizes, 0.015 and 0.070 mm. (66.49 % 

 copper) {0.040-in. stock). 



&0 



70 



C 60 



50 



40 



o 30 



o 



o. 



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 Cold Working 

 01 2345 67 89 10 

 BSS Numbers Hard 

 Chart 129. — The effect of cold rolling on the jdeld strengths of 

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

 mm. (66.49 % copper) (0.040-in. stock). 



80 



70 



C 60 



cr 

 I/) 50 



40 



o 30 



o 



o, 



20 



10 







11.0 2Q7 29.4 372 44.0 500 555 605 64.8 68.6 

 Percent Reduction of Area by Cold Working 

 01 2345 6789 10 

 ESS Numbers Hard 



Chart 130. — The effect of cold rolling on the yield strengths of 

 common high-brass strip, previously annealed to a grain size of 0.070 

 mm. (66.49 % copper) (0.040-in. stock). 



