The Leaded Brasses 



117 



i 



400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.F. (iHr. at Temp.) 



Chart 84. — The effect of annealing on the yield strength of free- 

 cutting braa3 rod, previously cold-drawn 30 per cent (reduction of 

 area) from extruded material having a grain size of 0.0,30 mm. (60.99 % 

 copper, 3.13 % lead, balance zinc) (rod under 1 in. in diameter). 



100 200 300 400 500 



Tempera+ure, Deg.R 



600 



Chart 85. — Effect of temperature on torsional properties of rod 

 brass (61.08% copper, 2.34% lead, 0.42% iron; 0.18% tin, balance 

 zinc) according to Bregousky and Spring'^^.s) (pod under 1 in. in 

 diameter) . 



200 400 600 800 1000 



Temperature, Deg. F.flHr at Temp.) 



Chart 86. — Effect of temperature on tensile strength, elastic limit, 

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

 free-cutting brass (62.50 % copper, 2.50 % lead, balance zinc) according 

 to Crane Company'"'" (rod under 1 in. in diameter). 



30 35 40 



Shear Strength, 1,000 Lb.perSq.In 



Chart 87. — Conversion chart for determination of shear strength 

 of free-cutting brass (61.50 % copper, 3.00 % lead, balance zinc) when 

 tensile strength is known. Accurate to ±5%."*' 



