180 



Copper and Copper-base Alloys 



120 



100 1 — r* *- 



90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 



500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.EC 1 Hr of Temp.) 



Chart 10. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. 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 vain. (77.74% copper, 1.30% 

 silicon, balance zinc) (0.040-iu. stock). 



120 



no 



100 

 . 90 



cr 80 

 ^ 70 



Q. 



5 60 



o 



i50 



40 



30 



20 



10 







500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg. E ( I Hr a+ Temp.) 



Chart 11. — The effect of annealing on the yield strength of silicon- 

 brass No. 1 strip, previously cold-rolled 6 B. & S. Nos. (50 per cent 

 reduction of area) from a grain size of 0.015 mm. (77.74 % copper, 

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



500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg. EC IHr. at Temp.) 



Chart 12. — The effect of annealing on the yield strength of silicon-brass No. 1 strip, previously cold-rolled 6 B. & S. Nos. (50 per cent reduction 

 of area) from a grain size of 0.090 mm. (77.74 % copper, 1.30 % silicon, balance zinc) (0.040-in. stock). 



