The Coppers 



19 



11.0 20.7 29.4 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percen+ Reduc+ion of Area by Rolling 

 0123456789 10 

 B and S Numbers Hard 

 Chart 48. — The effect of cold rolling on the yield strengths of 

 arsenical tough-pitch copper strip previously annealed to a grain size 

 of 0.050 mm. (99.50 % copper, 0.45 % arsenic) (0.040-in. stock). 



11.0 -207 29.4 372 44.0 50.0 55.5 60.5 648 68.6 

 Ftercent Reduction of Area by Rolling 

 I 23456789 10 

 B and S Numbers Hard 

 Chart 49. — The effect of cold rolling on the yield strengths of 

 arsenical tough-pitch copper strip previously annealed to a grain size 

 of 0.020 mm. (99.50 % copper, 0.45 % arsenic) (0.040-in. stock). 



•60 



50 



40 - 



30 



2- 20 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F ( IHr. at Temp.) 



Chabt 50. — The effect of annealing on the tensile strength and 

 apparent elastic limit of arsenical tough-pitch copper strip previously 

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

 different grain sizes, 0.020 and 0.050 mm. (99.50 % copper, 0.45 % 

 arsenic) (O.040-in. stock). ' 



400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Tennp. in Deg.H (IHr. at Temp.) 



Chart 51. — The effect of annealing on the grain-growing character- 

 istics of arsenical tough-pitch copper strip previously cold-rolled 

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

 sizes, 0.020 and 0.050 mm. (99.50 % copper, 0.45 % arsenic) (•0.040-in. 

 stock). 



