210 



Copper and Copper-base Alloys 



100 



90 



80 



£ 70 



'^ 60 



^50 

 XI 



_i 



o 40 

 o 

 o 

 -~ 30 



20 



10 



11.0 20.7 2M 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B&S Numbers Hard 

 Chart 59. — The effect of cold rolling on the yield strengths of 12 

 per cent nickel-silver strip, previously annealed to a grain size of 0.015 

 mm. (66.24% copper, 11.57% nickel, balance zinc) (0.040-in. stock). 



100 

 90 

 80 



1/0 



^ 60 



Q- 



^ 50 

 o 

 § 40 



30 



20 



11.0 20.7 29.4 372 440 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 0123456789 10 

 B&S Numbers Hard 



Chart 60. — The effect of cold rolling on the yield strengths of 

 12 per cent nickel-silver strip, previously annealed to a grain size of 

 0.080 mm. (66.24% copper, 11.57% nickel, balance zinc) (0.040-in. 

 stock) . 



1000 1100 1200 1300 1400 



Annealing Temp. in Deg.F(lHrat Temp.) 



Chakt 61. — The effect of annealing on the grain-growing charac- 

 teristics of 12 per cent nickel-sUver 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. (66.24% copper, 11.57% nickel, balance zinc) 

 (0.040-in. stock). 



110 

 100 



90 



80 



£ 70 

 ^ 60 



i 50 



ji 



-^ 40- 



o 



o 



S 30 

 20 



10 







400 500 600 700 800 900 1000 1100 1200 1300 

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



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

 apparent elastic limit of 12 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. (66.24% copper, 11.57% 

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



