The Silicon Bronzes 



247 



10 20 30 40 50 60 70 80 90 

 Percent Reduction by Cold Drawing 

 Chart 21. — The effect of cold drawing on the yield strength of 

 Type B silicon-bronze rod, previously annealed to a grain size of 0.115 

 mm. (1.76 % silicon, 0.35 % manganese, balance copper) (rod under 

 1 in. in diameter). 



10 20 30 40 50 60 70 80 90 

 Percent Reduction by Cold Drawing 



Chaht 22. — The effect of cold drawing plus relief annealing at 600°F 

 for 30 min. on the yield strength of Type B silicon-bronze rod, pre- 

 viously annealed to a grain size of 0.115 mm. (1.76% silicon, 0.35% 

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



110 



too 



90 



80 



£. 70 

 & 

 "^ 60 



<u 



'^ 50 



-J 



o 40 



o 



o 



"" 30 

 20 

 10 







Room 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.l^ (1 Hr. at Temp.) 



Chart 23. — The effect of annealing on the tensile strength, apparent 

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

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

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

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



d^lIO 

 2 100 



CQ 



-T3 90 

 a 

 o 



i^ 



S 70 



U- 



% 60 



CQ 



'^ 50 



n 

 S 40 



I 30 

 = 20 



CO 



^ 10 

 o 



Room 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.F. (IHratTemp.) 



Chart 24. — The effect of annealing on the Rockwell hardness, 

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

 Type B silicon-bronze rod, previously cold-drawn 50 per cent (reduc- 

 tion of area) from material have two different grain sizes, 0.015 and 

 0.115 mm. (1.76% silicon, 0.35% manganese, balance copper) (rod 

 under 1 in. in diameter). 



