22 



Copper and Copper-base Alloys 



60 



55 



50 



45 



•^40 



35 



30 



25 



20 



10 20 30 40 50 60 70 

 Percent Reduc+ion in Area 



80 



Chakt 58. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of leaded copper rod previously annealed to a 

 grain size of 0.030 mm. (99.00 % copper, 1.00 % lead) (rod under 1 in. 

 in diameter). 



o 90 

 o 



_i 



,Di80 



o 



^ 70 



u. 



= 60 



CO 



= IS50 

 I 



^40 

 c 



■? 30 

 o 



= 20 

 <u 



I 10 



o 



o 



^ 



10 20 30 40 50 60 70 80 

 Percent Reduction in Area 

 Chakt 59. — The effect of cold drawing on the Rockwell hardness, 

 percentage elongation in 2 in. and percentage reduction of area of 

 leaded copper rod 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 by Cold Working 

 Chakt 60. — The effect of cold drawing on the yield strength of 

 leaded copper rod previously annealed to a grain size of 0.030 mm. 

 (rod under 1 in. in diameter). 



HD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg. F. (1 Hn at Temp.) 



Chart 61. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of leaded copper rod previously cold- 

 drawn 50 per cent (reduction of area) from material having a grain 

 size of 0.030 mm. (rod under 1 in. in diameter). 



