202 



Copper and Copper-base Alloys 



Q080 



0.060 



.E Q040 



0.020 



1000 1100 1200 1300 1400 



^Annealing Temp, in Deg.R ClHT:a+ Temp.) 



Cn.'iHT 33. — The effect of annealing on the grain-growing charac- 

 teristics of 18 per cent nickel-silver (spring) strip, previously cold- 

 rolled 6 B. & S. No3. (50 per cent reduction of area) from two different 

 grain sizes, 0.015 and 0.080 mm. (56.56 % copper, 17.77 % nickel, 

 balance zinc) (0.040-in. stock). 



140 



130 

 120 



no 



100 

 90 



. 80 

 70 

 60 



. 50 

 40 

 30 

 20 

 10 







CR 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp. in Deg.F f I Hr. a+ Temp.) 



Chart 34. — The effect of annealing on the tensile strength and 

 apparent elastic limit of 18 per cent nickel-silver (spring) 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. (56.56 % copper, 17.77 % 

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



500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp in Deg. F ( 1 hr: at Temp.) 



Chart 35. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of 18 per cent nickel-silver (spring) 

 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. (56.56 % 

 copper, 17.77 % nickel, balance zinc) (0.040-in. stock). 



140 



130 



120 



110 



100 



90 



£ 80 

 & 

 " 70 



!«> 



g 50 



o 



40 



30 

 20 

 10 







500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deq.F f 1 hr at Temp.) 



Chart 36. — The effect of annealing on the yield strength of 18 

 per cent nickel-sUver (spring) strip, previously cold-rolled 6 B. & S. 

 Nos. (50 per cent reduction of area) from a grain size of 0.015 mm. 

 (56.56% copper, 17.77% nickel, balance zinc) (0.040-in. stock"). 



