214 



Copper and Copper-base Alloys 



1100 1200 1300 1400 



Annealing Temp, in Deg.F.(^l Hr;a+ Temip.) 



Chart 73. — The effect of annealing on the grain-growing charac- 

 teristics of 10 per cent nickel-silver strip, previously cold-rolled 6 B. & 

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

 0.015 and O.OSO mm. (66.02 % copper, 10.73 % nickel, balance zinc) 

 (0.040-in. stock). 



-^ 50 



O 4-0 



no 



100 

 90 

 80 



, 70 f-="-t~- 

 60 



30 



20 







CR 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.F (1 Hr. a+ Temp.) 



Chart 74. — The effect of annealing on the tensile strength and 

 apparent elastic limit of 10 per cent nickel-silver strip, previously 

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

 different grain sizes, 0.015 and 0.080 mm. (66.02 % copper, 10.73 % 

 nickel, balance zinc) (0.040-in. stock). 



120 



- 100 



CO 



90 



80 



S 70 



n 60 



50 



40 — 



30 



= 20 



CR 500 600 700 800 900 1000 1100 1200 1300 WOO 

 Annealing Temp, in Deg.FOHr. at Temp.) 



Chart 75. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of 10 per cent nickel-silver strip, previ- 

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

 two different grain sizes, 0.015 and 0.080 mm. (66.02 % copper, 10.73 % 

 nickel, balance zinc) (0.040-in. stock). 



lie 



100 



90 



80 



£ 70 



^ 60 



ex 50 



o 40 



o 



o 



-- 30 



500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.Ff IHr.af Temp.) 



Chart 76. — The effect of annealing on the yield strength of 10 per 

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

 cent reduction of area) from a grain size of 0.015 mm. (66.02 % copper, 

 10.73 % nickel, balance zinc) (0.040-in. stock). 



