198 



Copper and Copper-base Alloys 



100 



90 



80 



70 



6-60 



«; 50 



5 40 

 o 

 I 30 



20 



10 



1 1.0 20.7 224 372 44.0 50.0 55.5 60.5,64.8 68.6 



Percen+ Reduc+ion of Area by Rolling 



01 2345 6789 10 



BS-S Numbers Hard 



CsLiKT 19. — The effect of cold rolling on the yield strengths of IS 



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



mm. (66.00% copper, 18.00% nickel, balance zinc) (0.040-in. stock). 



100 



90 



80 



£ 70 



^ 60 



S. 50 

 j3 



-■ 40 

 o 

 o 

 2- 30 



20 



10 







11.0 20.7 Z9.4 372 44.0 5W 55.5 60.5 64.8 68.6 

 Percent Reduc+ion of Area by Rolling 

 01 2345 67 8 9 10 

 BS-S Numbers Hard 

 Chart 20. — The effect of cold rolling on the yield strengths of 18 

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

 0.070 mm. (66.00 % copper, 18.00 % nickel, balance zinc) (0.040-in. 

 stock). 



1100 1200 1300 1400 



Annealing Temp, m Deg.R ( 1 H'^ of Temp.) 



Ch.\kt 21. — The effect of annealing on the grain-growing charac- 

 teristics of 18 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 0.070 mm. (66.00% copper, 18.00% nickel, balance zinc) 

 (0.040-in. stock). 



CR 400 500 600 700 800 900 1000 1100 1200 000 

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

 Ch.\kt 22. — The effect of annealing on the tensile strength and 

 apparent elastic limit of 18 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 0.070 mm. (66.00 % copper, 18.00 % 

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



