114 



0.050 



Q040 



Copper and Copper-base Alloys 



0.030 



■S ao20 



0.010 



700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.F. (I Hr. a+ Temp.) 



Chart 74. — The effect of annealing on the grain-growing character- 

 istics of leaded-brass strip, previously cold-rolled 6 B. & S. Nos. (50 per 

 cent reduction of area) from two different grain sizes, 0.015 and 0.035 

 mm. (60.96 % copper, 1.53 % lead, balance zinc) (0.040-in. stock). 



100 



90 



^ 60 



\- 



Q- 50 

 Xi 



o 40 

 o 

 o 

 -- 30 



20 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg. F(IHr. at Temp.) 



Chart 75. — The effect of annealing on the tensile strength and 

 apparent elastic limit of leaded-brass strip, previously cold-rolled 

 6 B. & S. Nos. (50 per cent reduction of area) from two different grain 

 sizes, 0.015 and 0.035 mm. (60.96 % copper, 1.53 % lead, balance zinc) 

 (0.040-in. stock). 



400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Anneah'ng Temp, in Deg. F. (IHrat Temp.) 



Chart 76. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of leaded-brass strip, previously cold- 

 roUed 6 B. & S. Nos. (50 per cent reduction of area) from two different 

 grain sizes, 0.015 and 0.035 mm. (60.96 % copper, 1.53 % lead, balance 

 zinc) (0.040-in. stock). 



90 

 80 

 70 



C 60 



cr 

 ^ 50 



01 



^40 



xi 



o 30 



o 



o 



-~ 20 



400 500 600 700 800 900 1000 1100 1200 1300 WOO 

 Annealing Temp, in Deg.F f IHn at Temp.) 



Chart 77. — The effect of annealing on the yield strength of leaded- 

 brass strip, previously cold-rolled 6 B. & S. Nos. (50 per cent reduction 

 of area) from a grain size of 0.015 mm. (60.98 % copper, 1.53 % lead, 

 balance zinc) (0.040-in. stock). 



