84 



Copper and Copper-base Alloys 



120 



no 

 too 



90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 

 10 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

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



Chart 175. — The effect of annealing on the Rockwell hardness, 

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

 Muntz metal rod, previously cold-drawn 30 per cent (reduction of 

 area) from extruded material having a grain size of 0.010 mm. (60.73 % 

 copper) (rod under 1 in. in diameter). 



70 



60 



50 



c 

 ,T 40 



30 



20 



10 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg. R (1 Hr. a-f Temp.) 



Chart 176. — The effect of annealing on the yield strength of Muntz 

 metal rod, previously cold-drawn 30 per cent (reduction of area) 

 from extruded material having a grain size of 0.010 mm. (60.73 % 

 copper) (rod under 1 in. in diameter) 



no 



200 400 600 800 1000 1200 WOO 1600 

 Temperature. Deg. F. ( 1 Hr at Temp.) 



Chart 177. — The effect of elevated temperatures on the tensile 

 strength, percentage reduction of area, and percentage elongation in 

 2 in. of Muntz metal rod (62.40% copper), previously cold-drawn 

 20 per cent (rod under 1 in. in diameter). 



CD 500 600 700 800 900 1000 1100 1200 1200 

 Annealing Temp, in Deg. F. f 1 Hr. at Temp.) 



Chart 178. — The effect of annealing on the tensile strength and 

 apparent elastic limit of Muntz metal (60.80 % copper) tube, previ- 

 ously cold-drawn 60 per cent (reduction of area) from a grain size of 

 0.020 mm. 



