The Silicon Bronzes 



241 



120 



1 1.0 20.7 294 37.2 44.0 50.0 55.5 60.5 64.8 68.6 

 Perceni Reduction of Area by Rolling 

 0123456789 10 

 B5S Numbers Hard 



Chart 1. — The effect of cold rolling on the tensile strength and 

 apparent elastic limit of Type A silicon-bronze strip, previously 

 annealed to two different grain sizes, 0.015 and 0.080 mm. (96.50 % 

 copper, 3.00 % silicon, 0.50 % tin) (0.040-in. stock). 



11.0 20.7 294 372 44.0 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B5S Numbers Hard 



Chart 2. — The effect of cold rolling on the Rockwell hardness and 

 percentage elongation in 2 in. of Type A silicon-bronze strip, previously 

 annealed to two different grain sizes, 0.015 and 0.080 mm. (96.50 % 

 copper, 3.00 % silicon, 0.50 % tin) (0.040-iu. stock). 



c 130 

 & 

 ^ 120 



^110 



_l 



I 100 



I '° 



.u 80 



'I 70 

 +- 



^ 60 



o 



^ 50 

 Ss 



X 40 



-I- 



S 30 



u 



^ 20 



CR 550 600 700 800 900 1000 1100 1200 IJOO 1400 

 jAnnealing Temp, in Deg. F^ ( I Hr at Temp.) 



Chart 3. — The effect of annealing on the tensile strength and 

 apparent elastic limit of Type A silicon-bronze strip, previously cold- 

 roUed 10 B. & S. Nos. (67 per cent reduction of area) from a grain size 

 of 0.070 mm. (96.50 % copper, 3.00 % sUicon, 0.50 % tin) (0.040-in. 

 stock) . 



130 



120 



05 



i«:U0 



,100 



c 90 



js) 80 



70 



.S 60 



X 50 



S40 



30 



20 







CR 550 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.E (iHr. at Temp.) 



Chart 4. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of Type A silicon-bronze strip, previously 

 cold-rolled 10 B. & S. Nos. (67 per cent reduction of area) from a grain 

 size of 0.070 mm. (96.50 % copper, 3.00 % silicon, 0.50 % tin) (0.040-in. 

 Btock). 



