The Special Brasses 



179 



120 

 110 

 100 



^ 80 

 g. 70 



^ 60 

 o 



I 50 

 40 

 30 

 20 

 LO 



ILCi 20.7 29.4 37.Z 440 50.0 55.5 605 648 68.6 

 Perceni feeduc+ion of Area by Rolling 

 J 2. 34 56 7 89 10 

 B5S Numbers Hard 



Chart 6. — The effect of cold roUing'on the yield strengths of silicon- 

 brass No. 1 strip, previously annealed to a grain size of 0.015 mm. 

 (77.74 % copper, 1.30 % silicon, balance zinc) (0.040-in. stock). 



100 



90 



80 



£ 70 

 d* 



'Z 60 

 <u 

 5^50 



o 40 

 o 

 "' 30 



20 



10 







11.0 20.7 29.4 37.2 44.0 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 I 2 3456789 10 

 B&S Numbers Hard 



Chakt 7. — The effect of cold rolling on the yield strengths of silicon- 

 brass No. 1 strip, previously annealed to a grain size of 0.090 mm. 

 (77.74 % copper, 1.30 % silicon, balance zinc) (0.040-in. stock). 



900 1000 1100 1200 1300 1400 



Annealing Temp, in Deg.Ff 1 Hr at Temp.) 



Chaht 8. — The effect of annealing on the grain-growing character- 

 istics of silicon-brass No. 1 strip, previously cold-rolled 6 B. & S. 

 Nos. (50 per cent reduction of area) from two different grain sizes, 

 0.015 and 0.090 mm. (77.74 % copper, 1.30 % silicon, balance zinc) 

 (0.040-in. stock). 



CR 500 600 700 800 900 1000 1100 1200 1300 1400 

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



Chart 9. — The effect of annealing on the tensile strength and 

 apparent elastic limit of silicon-brass No. 1 strip, previously cold- 

 rolled 6 B. & S. Nos. (50 per cent reduction of area) from two different 

 grain sizes, 0.015 and 0.090 mm. (77.74 % copper, 1.30 % silicon, 

 balance zinc) (0.040-in. stock). 



