The Aluminum Bronzes 



255 



10 20 30 40 50 60 70 80 

 Percent Reduc+ion in Area 

 Chart 1. — The effect of cold drawing on the tensile strength and 

 apparent elastic limit of 5 per cent aluminum-bronze rod, previ- 

 ously annealed to a grain size of 0.025 mm. (95.19 % copper, 4.66 % 

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



10 20 30 40 50 60 70 80 

 Percent Reduction in Area 

 Chart 2. — The effect of cold drawing on the Rockwell hardness, 

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

 5 per cent aluminum-bronze rod, previously annealed to a grain size 

 of 0.025 mm. (95.19% copper, 4.66% aluminum) (rod under 1 in. in 

 diameter) . 



OT 



to 



110 



100 



: 90 



' 80 



g_70 



^ 60 

 o 

 o 

 2 50 



+■ 40 



P 30 



20 



0) 



y 10 

 



10 20 30 40 50 60 70 80 



Percent Reduction by Cold Drawing 



Chart 3. — The effect of cold drawing on the yield strength of 5 

 per cent aluminum-bronze rod, previously annealed to a grain size of 

 0.025 mm. (95.19% copper, 4.66% aluminum) (rod under 1 in. in 

 diameter) . 



130 

 120 

 110 

 100 



£ 90 



^?,(^ 



1. 

 <u 



Q-70 

 ja 



o 60 

 o 



£ 50 



40 

 30 

 20 



CD 400 500 600 700 800 900 1000 IIOO 1200 1300 

 Annealing Temp.inDeg.H (1 Hr. at Temp.) 



Chart 4. — The effect of annealing on the tensile strength and 

 apparent elastic limit of 5 per cent aluminum-bronze rod, previously 

 cold-drawn 50 per cent (reduction of area) from material having a grain 

 size of 0.025 mm. (95.19 % copper, 4.66 % aluminum) (rod under 1 in. 

 in diameter). 



