64 



Copper and Copper-base Alloys 



200 400 600 800 1000 1200 1400 1600 

 Tempera+ure in Deg.E (IHr. a+Temp.) 



Chart 110. — The effect of elevated temperature on the tensile 

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

 70-30 (cartridge brass) rod, previously cold-worked 20 per cent (reduc- 

 tion of area) (68.00 % copper) xiccording to W. B. Price."' 



100 



Q.^80 



0-r- 



Is™ 



Do 60 



50 



I- t 



40 



.-=T 30 



20 







CD. 



500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.K (IHr.a+Temp.) 



Chart 111. — The effect of annealing on the tensile strength and 

 apparent elastic limit of 70-30 (cartridge brass) tube, previously cold- 

 drawn 65 per cent (reduction of area) from a grain size of 0.050 mm. 

 (69.74% copper). 



CD 



500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.H ( 1 Hr. a+ Temp.) 



Chart 112. — The effect of annealing on the Rockwell hardness, 

 percentage elongation in 2 in., and grain size of 70-30 (cartridge brass) 

 tube, previously cold-drawn 65 per cent (reduction of area) from a 

 grain size of 0.050 mm. (09.74 % copper). 



50 



40 



50 



^ 20 



200 400 600 800 



Temperature^ Deg. R 



1000 1200 



Chart 113. — The effect of elevated temperature on the Izod-impact 

 strength of previously annealed 70-30 (cartridge brass) according to 

 D. Bunting.'') 



