The Brasses 



51 



100 

 90 

 80 

 70 

 £ 60 



Lo 



5 30 

 o 



o 20 



10 20 30 40 50 



Percen+ Reduc+ion by Cold Working 



60 



Chart 67. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of low-brass rod, previously annealed to a grain 

 size of 0.060 mm. {80.95 % copper) (rod under 1 in. in diameter). 



10 20 30 40 50 60 



Percen+ Reduc+ion by fold Working 



Chart 68. — The effect of cold drawing on the Rockwell hardness, 

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

 low-brass rod, previously annealed to a grain size of 0.060 mm. (80.95 % 

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



80 



70 



c 60 



50 



40 



30 



20 



10 20 30 40 50 60 



Percen+ Reducfion by Cold Working 



Chart 69. — The effect of cold drawing on the yield strength of low- 

 brass rod, previously annealed to a grain size of 0,060 mm. (80.95 % 

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



80 i 



70 



C 60 



50 



^40 



S 30 



20 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg. F. f 1 Hr. a+ Temp.) 



Ch.vrt 70. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of low-brass rod, previously cold-drawn 

 37 per cent (reduction of area) from material having a grain size of 

 0.060 mm. (80.95 % copper) (rod under 1 in. in diameter). 



