The Coppers 



15 



II.O 20.7 29.4 37.2 44.0 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 0125456789 10 

 B and S Numbers Hard 



Chart 36. — The effect of cold rolling on the yield strengths of silver- 

 bearing copper stiip previously annealed to a grain size of 0.015 mm. 

 (99.95 % copper, 10 oz. of silver per ton) (0.040-in. stock). 



11.0 20.7 29.4 372 44.0 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 01 23456 7 89 10 

 B and S Numbers Hard 

 Chart 37. — The effect of cold rolling on the yield strengths of silver- 

 bearing copper strip previously annealed to a grain size of 0.035 mm. 

 (99.95 % copper, 10 oz. of silver per ton) (0.040-in. stock). 



0.050 



0.040 



0.030 



0.020 



0.010 



500 700 900 IIOO 1300 1500 



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



Chart 38. — The effect of annealing on the grain-growing character- 

 istics of silver-bearing copper strip previously cold-rolled 6 B. & S. Nos. 

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

 and 0.035 mm. (99.95 % copper, 10 oz. of silver per ton) (0.040-in. 

 stock) . 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

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



Chart 39. — The effect of annealing on the tensile strength and 

 apparent elastic limit of silver-bearing copper strip previously cold- 

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

 grain sizes, 0.015 and 0.035 mm. (99.95 % copper, 10 oz. of silver per 

 ton) (0.040-in. stock). 



