12 



Copper and Copper-base Alloys 



H.O 20.7 2Q.4 37.2 44.0 500 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 1 234567 89 10 

 Band S Numbers Hard 



Ch.\rt 26. — The effect of cold rolling on the jnield strength of oxygen- 

 free copper strip (no residual deoxidant) previously annealed to a 

 grain size of 0.015 mm. (99.94 % copper) (0.040-in. stock). 



11.0 20.7 29.4 37.2 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 12 3456 789 10 

 B and S Numbers Hard 

 Chart 27. — The effect of cold rolling on the yield strength of oxygen- 

 free copper strip (no residual deoxidant) previously annealed to a grain 

 size of 0.040 mm. (99.94 % copper) (0.040-in. stock). 



0.200 

 0.180 

 0.160 

 0.140 

 a 1 20 

 01 00 

 O080 

 0060 

 0040 

 0.020 



CR 500 700 900 1100 1300 1500 



Annealing Temp, in Deg.F. (I Hr. a\ Temp.) 



Chart 28. — The effect of annealing on the grain-growing character- 

 istics of oxygen-free copper strip (no residual deoxidant) previously 

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

 annealed to different grain sizes, 0.015 and 0.040 mm. (99.94 % copper) 

 (0.040-in. stock). 



CR 500 700 900 1100 1300 1500 



Annealing Temp, in Deg.F. (l Hr. a\ Temp.) 



Chart 29. — The effect of annealing on the tensile strength, and 

 apparent elastic limit of oxygen-free copper strip (no residual deoxidant) 

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

 from material annealed to different grain sizes, 0.015 and 0.040 mm. 

 (99.94% copper) (0.040-in. stock). 



