60 



Copper and Copper-base Alloys 



100 

 90 

 80 

 70 



i^o 



to 

 I- 50 



D. 



xi 40 



§ 30 

 o 



20 



10 



11.0 20.7 29.4 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percen+ i?educ+ion of Area by Rolling 

 01 234567&9I0 1I 

 B^S Numbers Hard 

 Ch.\rt 94. — The effect of cold rolling on the yield strengths of 70-30 

 (cartridge brass) strip, previously annealed to a grain size of 0.015 mm. 

 (69.83 % copper) (0.040-in. stock). 



100 

 90 



80 

 c 



fc 60 



Q. 



•5 50 



o 



o 40 

 o 



30 

 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 Rolling 

 01 23 45 6789 10 

 B&S Numbers Hard 



Chakt 95. — The effect of cold rolling on the yield strengths of 70-30 

 (cartridge brass) strip, previously annealed to a grain size of 0.070 mm. 

 (69.83 % copper) (0.040-in. stock). 



110 



100 



90 



80 

 P 



t/O 



fe 60 

 o. 



5 50 



o 



§40 



30 



20 



CR 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F. fl Hr. atTernp.) 



Chabt 96. — The effect of annealing on the tensile strength and 

 apparent elastic Umit of 70-30 (cartridge brass) strip, previously 

 cold-rolled 6 B. & S. Nos. (50 per cent reduction of area) from two 

 different grain sizes, 0.015 mm. and 0.070 mm. (69.83 % copper) (0.040- 

 in. stock). 



0.280 



0.240 



0.200 



P QI60 



2 



0.120 



O.08O 



0.040 



800 900 1000 1100 1200 1300 1400 



Annealing Temp.in Deg. F. f i Hr.at Temp.) 



Chart 97. — The effect of annealing on the grain-growing charac- 

 teristics of 70-30 (cartridge brass) strip, previously cold-rolled 6 B. & S. 

 Nos. (50 per cent reduction of area) from two different grain sizes, 

 0.015 and 0.070 mm. (69.83 % copper) (0.040-in. stock). 



