The Brasses 



45 



20 



Ex+r. 10 20 30 40 50 60 



Percen-)- Reduction by Cold Working 



Chaet 48. — The effect of cold drawing on the tensile strength and 

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

 grain size of 0.050 mm. (85.68 % copper) (rod under 1 in. in diameter). 



110 

 100 

 90 



80 

 70 

 60 

 50 

 40 

 30 

 20 



Extr. 10 20 30 40 50 60 



Percent Reduction by Cold Working 



Chart 49. — The effect of cold drawing on the Rockwell hardness, 

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

 rich low-brass rod, previously annealed to a grain size of 0.050 mm. 

 (85.68 % copper) (rod under 1 in. in diameter). 



Extr. 10 20 30 40 50 



Percent Reduction by Cold Working 



60 



Chart 50. — The effect of cold drawing on the yield strength oi 

 rich low-brass rod, previously annealed to a grain size of 0.050 mm. 

 (85.68 % copper) (rod under 1 in. in diameter). 



70 



60 



50 



Qj 40 



S 30 



20 



CD. 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp.in Deg.F(l Hr. at- Temp.) 



Chart 51. — The effect of annealing on the tensile strength, apparent 

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

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

 size of 0.050 mm. (85.68 % copper) (rod under 1 in. in diameter). 



