The Brasses 



63 



120 



100 



90 



80 

 d 



u 

 m 



°r60 

 x> 



§ 50 

 o 



40 

 30 

 20 

 10 



80 



10 20 30 40 50 60 70 



Percen+ Reduction by Cold Drawing 



Chart 106. — The effect of cold drawing on the yield strength of 

 70-30 (cartridge brass) rod, previously annealed to a grain size of 

 0.045 mm. (70.26 % copper) (rod under 1 in. in diameter). 



110 

 100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



Room 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F flHrat Temp.) 

 Chart 107. — The effect of annealing on the tensile strength, 

 apparent elastic limit, and grain size of 70-30 (cartridge brass) rod, 

 previously cold-drawn 50 per cent (reduction of a,rea) from material 

 having a grain size of 0.045 mm. (70.26 % copper) (rod under 1 in. in 

 diameter) . 



Room400 500 600 700 800 900 1000 1100 1200 1300 

 Deg.F f I Hr.a+ Temp.) 



Chart 108. — The effect of annealing on the Rockwell hardness, 

 percentage elongation in 2 in., and percentage reduction of area of 70-30 

 (cartridge brass) rod, previously cold-drawn 50 per cent (reduction 

 of area) from material having a grain size of 0.045 mm. (70.26 % 

 copper) (rod under 1 in. in diameter) 



90 



80 



70 



^60 



6" 



to 



u50 



(U 

 Q- 



S.AQ 



o 



o 30 

 o 



20 

 10 



HD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg.F. (IHr.at Temp.) 



Chart 109. — The effect of annealing on the yield strength of 70-30 

 (cartridge brass) rod, previously cold-drawn 50 per cent (reduction 

 of area) from material having a grain size of 0.045 mm. (70.26 % 

 copper) (rod under 1 in. in diameter). 



