The Brasses 



77 



Ex+r. 10 20 30 40 50 60 



Percent Reduction by Cold IVorking 



Ceakt 152. — The effect of cold drawing on the tensile strength 

 and apparent elastic limit of common brass rod, previously annealed 

 to a grain size of 0.045 mm. (62.65 % copper) (rod under 1 in. in diam- 

 eter) . 



110 

 100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 



10 

 



60 



Ex+r. 10 20 30 40 50 



Percent Reduction by Cold Working 



Chart 153. — The effect of cold drawing on the Rockwell hardness, 

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

 common brass rod, previously annealed to a grain size of 0.045 mm. 

 (62.65 % copper) (rod under 1 in. in diameter). 



Ex+r. 10 20 30 40 50 60 



Percent Reduction by Cold Drawing 



Chart 154. — The effect of cold drawing on the yield strength of 

 common brass rod, previously annealed to a grain size of 0.045 mm. 

 (62.65 % copper) (rod under 1 in. in diameter). 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F. (1 Hr. at Temp.) 



Ch.4rt 155. — The effect of annealing on the tensile strength, 

 apparent elastic limit, and grain size of common brass rod, previously 

 cold-drawn 38 per cent (reduction of area) from material having a 

 grain size of 0.045 mm. (62.65 % copper) (rod under 1 in. in diameter). 



