258 



Copper and Copper-base Alloys 



140 



c 



0-150 



1/0 



t 120 



CL 



^ 110 

 o 



2 100 

 ■§ 90 

 .y 80 



E 60 



Q- 50 



^ 40 

 ON 30 



20 



= 10 



Soft 10 20 30 40 50 60 70 80 

 Percen+ Reduction in Cold Drawing 

 Chart 11. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of 8 per cent aluminum-bronze rod, previ- 

 ously annealed to a grain size of 0.070 mm. (91.73 % copper, 8.01 % 

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



Soft 10 20 30 40 50 60 70 60 

 Percent Reduction in Cold Drawing 

 Chart 12. — The effect of cold drawing on the Rockwell hardness, 

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

 S per cent aluminum-bronze rod, previously annealed to a grain size 

 of 0.070 mm. (91.73 % copper, 8.01 % aluminum) (rod under 1 in. in 

 diameter) . 



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

 Temperature in Deg.FflHr.at Temp.) 



Ch.\rt 13. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of 8 per cent aluminum-bronze rod, previ- 

 ously cold-drawn 50 per cent (reduction of area) from material having 

 a grain size of 0.070 mm. (91.73 % copper, 8.01 % aluminum) (rod under 

 1 in. in diameter). 



o no 



o 

 '° 100 







_g 90 



ch 

 S 80 



•SI 



= 70 

 o 

 ^ 60 



w 50 



-§ 40 

 1- 



D 



f 30 



i 20 



o 



Ol 10 







CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Temperature in Deg.rf IHr. at Tempi) 



Chart 14. — The effect of annealing on the Rockwell hardness, 

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

 8 per cent aluminum-bronze rod, previously cold-drawn 50 per cent 

 (reduction of area) from material' having a grain size of 0.070 mm. 

 (91.73 % copper, 8.01 % aluminum) (rod under 1 in. in diameter). 



