46 



Copper and Copper-base Alloys 



110 

 100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 



CD 400 500 600 700 800 900 1000 1100 1200 1300 1400 

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



Chabt 62. — The effect of annealing on the Rockwell hardness, 

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

 rich low-brass rod, previously cold-drawn 37 per cent (reduction of 

 area) from material having a grain size of 0.050 mm. (85.68 % copper) 

 (rod under 1 in. in diameter). 



70 



60 ^ 



50 



^40 



30 



20 



t 50 



P -^ 



^40 



:: 30 



^- <" 20 



200 400 600 800 1000 



Tempera+ure in Deg.F: (Ihr. a+ Temp.) 



Chaet 54. — The effect of elevated temperatures on the tensile 

 strength and percentage elongation in 2 in. of 85-15 brass rod according 

 to W. H. Bassett.""' 



CD 400 500 600 700 800 900 1000 1100 1200 1300 1400 

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



Chart 63. — The effect of annealing on the yield strength of rich 

 low-brass rod, previously cold-drawn 37 per cent (reduction of area) 

 from material having a grain size of 0.050 mm. (85.68 % copper) (rod 

 under 1 in. in diameter). 



CD 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp.in Deg.F(lHT:at Temp.) 



Chart 65. — The effect of annealing on the tensile strength and 

 apparent elastic limit of 86-15 brass condenser tube, previously 

 cold-drawn 65 per cent (reduction of area) from a grain size of 0.050 

 mm. (85.01 % copper). 



