124 



Copper and Copper-base Alloys 



CD 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing.Temp.in Deg.F^ (IHr.at Temp.) 



Chart 105. — The effect of annealing on the Rockwell hardness, 

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



CD 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg.H(lHr. a+ Temp.) 



Chart 106. — The effect of annealing on the sdeld strength 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). 



0.002 0.004 0.006 0.008 

 5+rain, Inches per In. 



CH.4.RT 107.— The effect of cold drawing on the stress-strain characteristics of standard-brass forging rod (under 1 in. in diameter) , prewously 

 extruded to a grain size of 0.010 mm.; 100,000-lb. capacity hydraulic testing machine and Templin automatic extensometer accurate to O.OOOUl m. 

 used. (60.05 % copper, 2.12 % lead, balance zinc.) 



