146 



Copper and Copper-base Alloys 



0.120 



0.100 



0.080 



0.060 



0.040 



0.020 



0000 



700 800 900 1000 1100 1200 1300 



Annealing Temp, in Deg.F. (1 Hn oi+ Temp.) 



Chart 37. — The effect of annealing on the grain-growing character- 

 istics of admiralty-metal strip, previously cold-roUed 6 B. & S. Nos. 

 (50 per cent reduction of area) from two different grain sizes, 0.015 

 and 0.080 mm. (70.37 % copper, 1.01 % tin, balance zinc) (0.040-in. 

 stock) . 



110 



100 



90 



80 



: 70 



s_ 60 



(U 



a 



w 



^ 50 



_i 



o 40 



o 



o 



30 

 20 

 10 







400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp.in Deg.R (I Hr. ct+ Temp.) 



Chart 38. — The effect of annealing on the tensile strength and 

 apparent elastic limit of admiralty-metal 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. (70.37 % copper, 1.01 % tin, balance zinc) 

 (0.040-in. stock). 





100 





^ 80 



^ 70 



60 



•^ 50 



40 



u 30 



= 20 



CR 400 600 600 700 800 900 1000 1100 1200 1300 

 Annecaling Temp.in Deg.F (IHr. a+ Temp.^ 



Chart 39. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of admiralty-metal 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. (70.37 % copper, 1.01 % tin, 

 balance zinc) (0.040-in. stock). 



100 

 90 

 80 



cH"60 

 oj 50 



D. 



:5 40 



o 

 g_30 



20 



10 







400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp in Deg.F. (1 Hr.af Temp.) 



Chart 40. — The effect of annealing on the yield strength of admir- 

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

 reduction of area) from a grain size of 0.015 mm. (70.37 % copper, 

 1.01 % tin, balance zinc) (0.040-in. stock). 



