272 



Copper and Copper-base Alloys 



100 

 90 

 80 

 70 



cr 



I/O 



I. 50 

 <u 

 o. 

 ^40 



_i 



8 30 



20 



5 10 15 20 25 30 



Percen+ Reduc+ion in Area by Cold Drawing 



Chabt 16. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of Carobronze tube (8.00 % tin, 0.30 % phospho- 

 rus, balance copper), previously annealed to a grain size of 0.035 mm. 



0.060 



0050 



Q040 



0.030 



0020 



0.010 



800 



900 1000 1100 1200 



Tempera+ure, Deg.F^ f I Hr. a+ Temp.) 



Chart IS. — The effect of annealing on the grain-growing charac- 

 teristics of Carobronze tube, previously cold-drawn 15 and 30 per cent 

 (reduction of area) from a grain size of 0.035 mm. (8.00 % tin, 0.30 % 

 phosphorus, balance copper). 



1120 



"13 100 



q 90 



i^ 80 



70 



CD 60 



-^ 50 



c 40 



JO 



20 



o 10 



5 10 15 20 25 30 



Percen+ Reduction in Area by Cold Drawing 



Chart 17. — The effect of cold drawing on the Rockwell hardness and 

 percentage elongation in 2 in. of Carobronze tube, previously annealed 

 to a grain size of 0.035 ram. (8.00 % tin, 0.30 % phosphorus, balance 

 copper) . 



95 

 90 

 85 

 80 

 75 

 70 

 65 

 ^. 60 



00 



1- 53 



0) 

 O- 



^' 50 

 8 45 

 "" 40 



35 



30 



25 



20 



Room 400 500 600 700 800 900 1000 1100 1200 

 Tempera+urejDeg.FClHra+Temp.) 



Chart 19. — The effect of annealing on the tensile strength and 

 apparent elastic limit of Carobronze tube, previously cold-drawn 

 15 and 30 per cent (reduction of area) from a grain size of 0.035 mm. 

 (S.OO % tin, 0.30 % phosphorus, balance copper). 



