The Brasses 



49 



.ElOO 



^90 



10 



o 

 C 80 



£ 70 

 c 



g:60 

 < 



-a 50 

 



X 40 



-*- 



5 30 



1- 



C; 20 

 « 10 



^ 



11.0 20.7 372 50.0 60.5 68.6 



Percen+ Reduc+ion of Area by Rolling 

 12 4- 6 8 10 



BSS Numbers Hard 



Chart 59. — The effect of cold rolling on the tensUe strength and 

 apparent elastic limit of low-brass (80-20) strip, previously annealed 

 to a grain size of 0.020 mm. (80.41 % copper) (0.040-in. stock). 



100 



90 



70 



60 



r £ 50 



40 



° ^ 



30 



20 



10 



68.6 



10 



11.0 20.7 37.2 50.0 605 



Percent Reduc+ion of Area by Rolling 

 12 4 6 8 



BS(S Numbers Hard 

 Chart 60. — The effect of cold rolling on the Rockwell hardness 

 and percentage elongation in 2 in. of low-brass (80-20) strip, previously 

 annealed to a grain size of 0.020 ram. (80.41 % copper) (0.040-in. stock) . 



80 



70 



60 



t 50 



a; 40 



o 30 



20 



11.0 20.7 29.4 372 44.0 50.0 55.0 60.5 64.8 68.6 

 Percenf Reduc+ion of Area by Rolling 

 01 23456 789 10 

 BS'S Numbers Hard 



Chart 61. — The effect of cold rolling on the yield strength of low- 

 brass (80-20) strip, previously annealed to a grain size of 0.020 mm. 

 (80.41 % copper) (0.040-in. stock). 



2 110 



■4;" 



.§ 100 



_1 



■I 90 



S 80 



-+- 



£ 70 



\- 



D 



a-60 

 < 



-c 50 



a 

 ^ 40 



cr> 



5 30 



^20 

 C 10 



CR 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.F^f 1 Hr.af Temp.) 



Chart 62. — The effect of annealing on the tensile strength and 

 apparent elastic limit of low-brass (80-20) strip, previously cold-rolled 

 4 B. & S. Nos. (37 per cent reduction of area) from a grain size of 

 0.020 mm. (80.41 % copper) (0.040-in. stock). 



