The Tin Brasses 



169 



10 20 30 40 50 



Percent Reduc+ion by Cold Working 



Chart 108. — The effect of cold drawing on the yield strength of 

 manganese-bronze rod, previously annealed to a grain size of 0.025 ram. 

 (58.64% copper, 1.13% iron, 0.75 % tin, 0.02% manganese, balance 

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



'110 

 100 



90 

 ^ 80 



70 



60 

 50 

 40 

 30 



I 20 







CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Temperature, Deg. H(lHr. a+ Temp.) 



Chart 110. — The effect of annealing on the Rockwell hardness, 

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

 manganese-bronze rod, previously cold-drawn 30 per cent (reduction 

 of area) from material having a grain size of 0.025 mm. (58.64 % copper, 

 1.13 % iron, 0.75 % tin, 0.02 % manganese, balance zinc) (rod under 

 1 in. in diameter). 



100 

 90 

 80 

 70 

 ■ 60 

 50 

 40 

 30 

 20 







CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Tempera+ure Deq.Ef 1 Hr. a+ Temp.) 



Chart 109. — The effect of annealing on the tensile strength, and 

 apparent elastic limit, of manganese-bronze rod, previously cold- 

 drawn 30 per cent (reduction of area) from material having a grain 

 size of 0.025 mm. (58.64% copper, 1.13% iron, 0.75% tin, 0.02% 

 manganese, balance zinc) (rod under 1 in. in diameter). 



400 500 600 700 800 900 1000 1100 1200 1300 

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



Chart 111. — The effect of annealing on the yield strength of man- 

 ganese-bronze rod, previously cold-drawn 30 per cent (reduction of 

 area) from material having a grain size of 0.025 mm. (58.64 % copper, 

 1.13% iron, 0.75% tin, 0.02% manganese, balance zinc) (rod under 

 1 in. in diameter). 



