The Tin Brasses 



167 



§ 110 



■"1 100 

 ■a 

 

 ^ 90 



a> 



= 70 

 a 

 J^ 60 



-10 



M 50 



W 



-§ 40 

 I 30 

 I 20 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, m Deg.F; ( 1 Hr. ah Tennp.) 



Chart 103. — The effect of annealing in the Rockwell hardness, 

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

 high-lead naval-brass rod, previously cold-drawn 30 per cent (reduction 

 of area) from material having a grain size of 0.025 mm. (59.66 % copper, 

 1.02 % tin, 2.06 % lead, balance zinc) (rod under 1 in. in diameter). 



80 



70 



60 



50 



40 



30 



20 







CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg.R (IHr.at Temp.) 



Chart 104. — The effect of annealing on the yield strength of high- 

 lead naval-brass rod, previously cold-drawn 30 per cent (reduction of 

 area) from material having a grain size of 0.025 mm. (59.66 % copper, 

 1.02 % tin, 2.06 % lead, balance zinc) (rod under 1 in. in diameter). 



35 36 37 38 59 40 



Shear S+reng+h, 1 000 Lb. per Sq. In. 



Chart 105. — Conversion chart for determination of shear strength of high-leaded naval brass (60 % copper, 1.00 % tin, 2.00 % lead, balance zinc) 



when tensile strength is known. Accurate to +5 %.'**' 



