246 



Copper and Copper-base Alloys 



10 20 30 40 50 60 70 80 90 100 



Percent Reduc+ion in Area 



Chaht 17. — The effect of cold drawing on the tensile strength and 



apparent elastic limit of Type B silicon-bronze rod, previously annealed 



to two different grain sizes, 0.015 and 0.115 mm. (1.76 % silicon, 0.35 % 



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



130 



120 



no 



100 



90 



C 80 



^ 70 



Q- 60 



50 



40 



30 



20 







10 20 30 40 50 60 70 80 90 100 

 Percenf Reduction in Area 

 Ch.vrt is. — The effect of cold drawing plus relief annealing for 30 

 min. at 600°F. on the tensile strength and apparent elastic limit of 

 Type B silicon-bronze rod, previously annealed to two different grain 

 sizes, 0.015 and 0.115 mm. (1.76 % silicon, 0.35 % manganese, balance 

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



100 



S 90 



70 



s; 20 







90 



10 20 30 40 50 60 70 80 

 Percent Reduction in Area 

 Chart 19. — The effect of cold drawing on the Rockwell hardness, 

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

 Type B silicon-bronze rod, previously annealed to two different grain 

 sizes, 0.015 and 0.115 mm. (1.76 % silicon, 0.35 % manganese, balance 

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



CD 100 

 TS 



§ 90 



_i 



^ 80 

 o 

 Z 70 



^ 60 



CD 



L^ 50 



W 



3 40 



c 



"O 



^ 30 



X 



^ 20 



"u 10 

 o 







90 



10 20 30 40 50 60 70 80 

 Percent Reduction in Area 

 Chart 20. — The effect of cold drawing plus relief annealing on the 

 Rockwell hardness, percentage elongation in 2 in., and percentage 

 reduction of area of Type B silicon-bronze rod, previously annealed to 

 two different grain sizes, 0.015 and 0.115 mm. (1.76% silicon, 0.35% 

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



