The Leaded Brasses 



123 



Extr. 



10 20 30 



Percent Reduction by Cold Working 



Ex+r. 



10 20 



Percent Reduction by Cold Working 



30 



Chart 101. — The effect of cold drawing on the tensile strength and Chaht 102. — The effect of cold drawing on the Rockwell hardness, 



apparent elastic limit of forging rod, previously extruded to a grain percentage elongation in 2 in., and percentage reduction of area of 



size of 0.010 mm. (60.05 % copper, 2.12 % lead, balance zinc) (rod forging rod, previously extruded to a grain size of 0.010 mm. (60.05 % 



under 1 in. in diameter). copper, 2.12 % lead, balance zinc) (rod under 1 in. in diameter). 



70 



60 



50 



"C40 



30 



20 



Extr. 



10 20 



Percent Reduction by Cold Working 



30 



Chaet 103. — The effect of cold drawing on the yield strength of 

 forging rod, previously extruded to a grain size of 0.010 mm. (60.05 % 

 copper, 2.12 % lead, balance zinc) (rod under 1 in. in diameter). 



QD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg. [: C I Hn at Temp.) 



Chart 104. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of forging rod, previously cold-drawn 

 18 per cent (reduction, of area) from extruded material having a grain 

 size of 0.010 mm. (60.05% copper, 2.12% lead, balance zinc) (rod 

 under 1 in. in diameter). 



