130 



Copper and Copper-base Alloys 



Extr. 10 20 



Percent Reduc+ion by Cold Working 



Chaht 121. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of red-brass rod, previously extruded (55.02 % 

 copper, 1.62 % lead, balance zinc) (rod under 1 in. in diameter). 



^110 



o 



O|00 



CD 



-o 90 



c 



o 

 H 80 



S 70 

 u. 



~ 60 

 c 



CO 



^^ 50 



s ^ 



"g 30 



D 



^20 



10 20 



Percen+ Reduction by Cold Working 



Chart 122. — The effect of cold drawing on the Rockwell hardness, 

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

 brass rod, previously extruded (55.02 % copper, 1.62 % lead, balance 

 zinc) (rod under 1 in. in diameter). 



80 



70 



60 



50 



40 



'30 



-o 20 — 



10 — 



Ex+r. 10 20 



Percent Reduc+ion by Cold Drawing 



Chart 123. — The effect of cold drawing on the yield strength of red- 

 brass rod, previously extruded (55.02 % copper, 1.62 % lead, balance 

 zinc) (rod under 1 in. in diameter). 



110 

 100 

 90 

 80 



C 70 



& 

 ^ 60 



1- 



(U 



'^50 



Si 



o 40 



30 



20 



10 







CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.FClHr a+ Temp.) 



Chart 124. — The effect of annealing on the tensile strength and 

 apparent elastic limit of red-brass rod, previously cold-drawn 17 per- 

 cent (reduction of area) from extruded material (55.02 % copper, 

 1.62 % lead, balance zinc) (rod under 1 in. in diameter). 



