The Leaded Brasses 



111 



Extr. 



10 20 30 40 



Percenf Reduction by Cold Working 



Chart 64. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of riveting-and-turning rod, previously extruded 

 to a grain size of 0.040 mm. (61.98 % copper, 1.42 % lead, balance zinc) 

 (rod under 1 in. in diameter). 



110 



too 



90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



Ex+r. 10 20 30 40 



Percent Reduction by Cold Working 



Chart 65. — The effect of cold drawing on the Rockwell hardness, 

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

 riveting-and-turning rod, previously extruded to a grain size of 0.040 

 mm. (61.98 % copper, 1.42 % lead, balance zinc) (rod under 1 in. in 

 diameter). 



Exfn 10 20 30 40 50 



Percent Reduction by Cold Drawing 



Chart 66. — The effect of cold drawing on the yield strength of 

 riveting-and-turning rod, previously extruded to a grain size of 0.040 

 mm. (61.98 % copper, 1.42 % lead, balance zinc) (rod under 1 in. in 

 diameter). 



90 



80 



70 



£ 60 

 & 

 ^50 



^^40 



Si 



I 



o 30 

 o 

 o 

 --20 



400 500 600 700 800 900 1000 1100 1200 1300 

 Temperature, Deg.HflHnat Temp.) 



Chart 67. — The effect of annealing on the tensile strength, apparent 

 elastic limit, and grain size of riveting-and-turning rod, previously 

 cold-drawn 40 per cent (reduction of area) from extruded material 

 having a grain size of 0.040 mm. (61.98 % copper, 1.42 % lead, balance 

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



