The Leaded Brasses 



109 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg.F( IHr. a+ Temp.) 



Chabt 59. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of engraver's brass strip, previously 

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

 different grain sizes, 0.015 and 0.080 mm. (63.37 % copper, 1.53 % lead, 

 balance zinc) (0.040-in. stock). 



100 



90 



80 



B 70 

 & 



^ 60 



)- 



(U 



xi 



o40 

 o 

 o 

 -' 30 



20 



10 







400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F( I Hr, at Temp.) 



Chakt 60. — The effect of annealing on the yield strength of 

 engraver's brass strip, previously cold-rolled 6 B. & S. Nos. (50 per 

 cent reduction of area) from a grain size of 0.015 mm. (63.37 % copper, 

 1.53 % lead, balance zinc) (0.040-in. stock). 



Chabt 61.- 



90 

 80 



70 



£ 60 



& 

 "^ 50 



<u 



^40 

 x> 



o 30 

 o 

 o 

 -- 20 



10 



400 500 600 700 800 900 1000 1100 1200 1300 

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



-The effect of annealing on the yield strength of engraver's brass strip, previously cold-roUed 6 B. & S. Nos. (50 per cent reduction of 

 area) from a grain size of 0.080 mm. (63.37 % copper, 1.53 % lead, balance zinc) (0.040-in. stock). 



