128 



Copper and Copper-base Alloys 



Ex+r 10 20 30 



Percent Reduc+ion by Coid Working 



Chabt 116. — The effect of cold drawing on the yield strength of 

 architectiiral-bronze rod, previously extruded to a grain size of 0.025 

 mm. (56.64 % copper, 1.91 % lead, balance zinc) (rod under 1 in. in 

 diameter). 



CD +00 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Dcg.F! (IHr. a+ Temp.) 



Chart 117. — The effect of annealing on the tensile strength and 

 apparent elastic limit of architectural-bronze rod, previously cold- 

 drawn 18 per cent (reduction of area) from extruded material having 

 a grain size of 0.025 mm. (56.64 % copper, 1.91 % lead, balance zinc) 

 (rod under 1 in. in diameter). 



110 



100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



CD 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F (IHr. a + Temp.) 



Chart 118. — The effect of annealing on the Rockwell hardness, percentage elongation in 2 in., and percentage reduction of area of architec- 

 tural-bronze rod, previously cold-drawn 18 per cent (reduction of area) from extruded material having a grain size of 0.025 mm. (56.64 % copper, 

 1.91 % lead, balance zinc) (rod under 1 in. in diameter). 



