The Special Brasses 



189 



no 



100 



90 



80 



£ 70 

 d* 



"^ 60 

 i- 

 <u 



o- 50 

 j5 



o 40 

 o 



S30 

 20 



5 10 15 20 25 30 35 40 45 50 



Percent Reduc+ion in Area 



Chakt 38. — The effect of cold drawing on the tensile strength and 



apparent elastic limit of "Weldfast" bronze (modified Muntz metal), 



previously extruded (57.00 % copper, 1.96 % nickel, 1.46 % iron, 



0.21 % manganese, balance zinc) (rod under 1 in. in diameter). 



5 10 15 20 25 30 -55 40 45 50 

 Percen+ Reduc+ton in Area 



Chart 39. — The effect of cold drawing on the Rockwell hardness, 

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

 "Weldfast" bronze (modified Muntz metal), previously extruded 

 (57.00 % copper, 1.96 % nickel, 1.46 % iron, 0.21 % manganese, balance 

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



