The Brasses 



83 



100 



90 



c 80 



^ 70 



4) 60 



5 50 



§ 40 

 o 



"■" 30 



Extr. 



10 20 30 40 50 



Percent Reduc+ion by Cold Work 



60 



Chart 171. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of Muntz metal rod, previously extruded to a 

 grain size of 0.010 mm. (60.73 % copper) (rod under 1 in. in diameter). 



no 



100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 







Extr. 10 20 30 40 50 60 



Percent Reduction by Cold Drawing 



Chart 172. — The effect of cold drawing on the Rockwell hardness, 

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

 Muntz metal rod, previously extruded to a grain size of 0.010 mm. 

 (60.73 % copper) (rod under 1 in. in diameter). 



10 20 30 40 50 60 



Percent Reduction by Cold Work 



Chart 173. — The effect of cold drawing on the yield strength of 

 Muntz metal rod, previously extruded to a grain size of 0.010 mm. 

 (60.73 % copper) (rod under 1 in. in diameter). 



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

 Annealing Temp. in Deg. F\ f 1 Hr. at Temp.) 



Chart 174. — The effect of annealing on the tensile strength, 

 apparent elastic limit, and grain size of Muntz metal rod, pre-viously 

 cold-drawn 30 per cent (reduction of area) from extruded material 

 having a grain size of 0.010 mm. (60.73 % copper) (rod under 1 in. in 

 diameter). 



