264 



Copper and Copper-base Alloys 



100 



90 



■5-80 



b 70 



Q- 



3 60 



o 



§50 



40 



30 



20 



10 



Extr I 23456789 10 

 Percen+ Reduc+ion of Areoi by Cold Working 

 Chart 29. — ^The effect of cold work on the tensile strength and 

 apparent elastic limit of silicon-aluminum-bronze rod, previously 

 extruded to a grain size of 0.035 mm. (7.01 % aluminum, 1.98 % silicon, 

 balance copper) (rod under 1 in. in diameter) 



a. 



Ex+r 



10 



23456789 

 Percent Reduc+ion of Area by Cold Working 

 Chakt 30. — The effect of cold work on the Rockwell hardness, 

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

 silicon-aluminum-bronze rod, previously extruded to a grain size of 

 0.035 mm. (7.01 % aluminum, 1.98 % silioon, balance copper) (rod 

 under 1 in. in diameter). 



Ex+r. I 2 3 4 5 6 7 8 9 10 

 Percen+ Reduc+ion of Area b^ Cold Working 

 Chart 31. — The effect of cold work on the yield strength of silicon- 

 aluminum-bronze rod, previously extruded to a grain size of 0.035 

 mm. (7.01 % aluminum, 1.98 % silicon, balance copper) (rod under 

 1 in. in diameter). 



CO 600 700 800 900 1000 1100 1200 1300 1400 1500 

 Tempera+ure Deg.F. (1 Hr, o(+ Temp.) 

 Chart 32. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of silicon-aluminum-bronze rod, previously 

 cold-drawn 10.5 per cent (reduction of area) from extruded material 

 having a grain size of 0.035 mm. (7.01 % aluminum, 1.98 % silicon, 

 balance copper) (rod under 1 in. in diameter). 



