148 



Copper and Copper-base Alloys 



200 400 600 800 1000 1200 1400 1600 

 Tempera+ure in Deg.E(lHn a\ Temp.) 



Chart 45. — The effect of elevated temperature on the tensile 

 strength, percentage reduction of area, and percentage elongation in 

 2 in. of admiralty-metal rod (70.52 % copper, 1.27 % tin, balance zinc), 

 previously cold-worked 35 per cent' (reduction of area) according to 

 W. B. Price'" (rod under 1 in. in diameter). 



no 



100 

 90 

 80 



CO 



I- 60 



<u 



CL 



^ 50 



_j 



8 -^0 



o 

 " 30 



20 



500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp.ln Deg.F. Cl Hr. at Temp.) 



Chart 46. — The effect of annealing on the tensile strength and 

 apparent elastic limit of admiralty condenser tube, previously cold- 

 drawn 50 per cent (reduction of area) (71.34 % copper, 0.97 % tin, 

 balance zinc). 



5> 



siio 



100 



o 90 



o 



M 80 — 



(O 



70 



^ 50 



V, 40 



u 30 



= 20 

 I 10 



CD 



500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F. (I Hr. a+ Temp.) 



-The effect of annealing on the Rockwell hardness, percentage elongation in 2 in., and grain size of admiralty condenser tube, pre- 

 viously cold-drawn 50 per cent (reduction of area) (71.34 % copper, 0.97 % tin, balance zinc). 



