126 



Copper and Copper-base Alloys 



Extr. 5 10 15 20 25 



Percent Reduction by Cold Working 



30 



Chart 110. — The effect of cold drawing on the yield strength of 

 extruded-shapes rod, previously extruded to a grain size of 0.010 mm. 

 (59.31 % copper, 2.02 % lead, balance zinc) (rod under 1 in. in diam- 

 eter) . 



CD 400 500 600 700 800 900 1000 1100 1200 1300 1400 

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



Chart 111. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of extruded-shapes rod, previously cold- 

 drawn 15 per cent (reduction of area) from extruded material having a 

 grain size of 0.010 ram. (59.31 % copper, 2.02 % lead, balance zinc) 

 (rod under 1 in. in diameter). 



1 10 



100 



qo 



80 

 70 

 60 

 5.0 

 40 

 30 

 20 

 10 



CD 400 500 600 700 800 900 1000 IIOO 1200 1300 14O0 

 Annealing Temp in Deg. F. ( I Hn at Temp.) 



Chart 112. — The effect of annealing on the Rockwell hardness, 

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

 extruded-shapes rod, previously cold-drawn 15 per cent (reduction of 

 area) from extruded material having a grain size of 0.010 mm. (59.31 % 

 copper, 2.02 % lead, balance zinc) (rod under 1 in. in diameter). 



CD 400 500 600 700 800 QOO 1000 IIOO 1200 1300 1400 

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



Chart 113. — The effect of annealing on the yield strength of 

 extruded-shapes rod, previously cold-drawn 15 per cent (reduction of 

 area) from extruded material having a grain size of 0.010 mm. (59.31 % 

 copper, 2.02 % lead, balance zinc) (rod under 1 in. in diameter). 



