Copper and Copper-base Alloys 



10 20 30 40 50 60 70 80 

 Percen+ Reduction in Area 

 Chart. 15. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of electrolytic (tough-pitch) copper rod (99.93 % 

 copper, 0.04 % oxygen) previously annealed to a grain size of 0.030 mm. 

 (rod under 1 in. in diameter). 



10 20 30 40 50 60 70 80 

 Percent Reduction Arecj 

 Chaet 16. — The effect of cold drawing on the Rockwell F and B 

 hardness, percentage elongation in 2 in., and percentage reduction of 

 area of electrolytic (tough-pitch) copper rod (99.93 % copper, 0.04 % 

 oxygen) previously annealed to a grain size of 0.030 mm. (rod under 

 1 in. in diameter). 



10 20 30 40 50 60 70 80 90 100 

 Percent Reduction by Cold Work 



Chabt 17. — The effect of cold drawing on the yield strengths of 

 electrolsrtio (tough-pitch) copper rod (99.93 % copper, 0.04 % oxygen) 

 previously annealed to a grain size of 0.030 mm. (rod under 1 in. in 

 diameter) . 



50 



40 



cr30 



I 20 







HD 400 500 600 700 800 '^OO 1000 1100 1200 1300 

 Annealing Temp, in Deq.?. ( I Hr. at Temp.) 



Chart 18. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of electrolytic (tough-pitch) copper rod 

 (99.93 % copper, 0.04 % oxygen) previously cold-drawn 50 per cent 

 (reduction of area) from a grain size of 0.030 mm. (rod under 1 in. in 

 diameter) . 



