The Silicon Bronzes 



249 



120 



100 



~- 90 



60 



70 



50 



40 



y 30 



20 



11.0 2Q7 37.2 50.0 60.5 68.6 



Percent Reduc+ion of Area by Rolling 

 12 4 6 8 10 



EX'S Numbers Hard 

 Chart 29. — The effect of cold rolling plus relief annealing at 575°F. 

 for 30 min. on the tensile strength and apparent elastic limit of Type B 

 eilicon-bronze strip (2.10 % silicon, 0.24 % tin, balance copper) (0.040- 

 in. stock). 



120 

 110 



C 



o 100 



_i 



^^90 

 S 80 

 o 70 



CO 



^ 60 



to 



S 50 



L 40 

 o 



X 



= 30 



i 20 



o 

 Q^ 10 







11.0 207 372 500 605 68.6 



Percent Reduction of Area by Rolling 

 1 Z 4 6 8 10 



BSS Numbers Hard 



Chakt 30. — The effect of cold rolling plus relief annealing at 575°F. 

 for 30 min. on the Rockwell hardness and percentage elongation in 2 in. 

 of Type B silicon-bronze strip (2.10 % silicon, 0.24 % tin, balance 

 copper) (0.040-in. stock). 



120 



100 



90 



.y 80 



:2 70 



F 60 



D.50 



to 40 



30 



55 20 

 to 

 =i 10 



CR 550 600 700 %QQ 900 WOO 1100 1200 1300 1400 

 Annealing Temp, in Deg.i^Cl Hr at Temp.) 



Chart 31. — The effect of annealing on the tensile strength and 

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

 rolled 10 B. & S. Nos. (67 per cent reduction of area) (2.10 % silicon, 

 0.24 % tin, balance copper) (0.040-in. stock). 



120 



"E 100 







^ 90 



I 80 



u 

 c2 70 



I 

 £ 60 



(N 



-E 50 



-4- 



§ 40 

 c^ 30 

 .9 20 



CR 550 600 700 800 900 1,000 1100 1200 1300 1400 

 Annealing Temp, m Deg.R f 1 Hr. at Temp.) 



Chart 32. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of Type B silicon-bronze strip, previ- 

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

 (2.10 % silicon, 0.24 % tin, balance copper) (0.040-m. stock). 



