The Tin Bronzes 



279 



130 



120 



,5*100 



?i 90 



2 70 



^ 60 



C 

 -50 



§40 



u 



\ 30 



c 



o 



'i 20 



XT' 



£ 10 



Uliirnaie tensile sirenqih^ 



0. to 7o proof sfreng/h 



r 





^- 



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/ 



/ 



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/. 



/ 



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-A 



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r Limit of proportionality 



X 



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V- 



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y 



/_ 



/ 



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7 



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Elongation 



10 20 30 40 50 60 70 80 90 

 Percent Reduction in Area by Cold Working 

 Chaht 36. — The effect of cold rolling on the tensile strength, proof 

 strength, proportional limit, and percentage elongation in 2 in. of a 

 phosphor bronze (5.27% tin, 0.09% phosphorus, balance copper), 

 previously annealed at 1150°F. for 2 hr. according to Cook and 

 TalHs.'3»> 



260 

 240 



220 



200 



180 

 160 



3 140 



w 120 



10 



(U 



-^ 100 



X 80 



60 



40 



20 



I 



/ 



4, 



Diamond pyramid y^ 



/ 



A^ 



^ 



y- 



y 



^: 



/ 



/ 



yC 



y 



-y^ 



y 



Brinell, 10 Kq., Imm. 



Rockwell, 100 Kg., g "ball. 



"Rockwell, 100 Kg., A ball 



^Shore scleroscope^ 



^^ — t^^ — FT^ 



S.KrS. Shore sclera scope, U.H. 

 5 self- recorder 



I I I 



10 20 30 40 50 60 70 80 90 

 Percent Reduction in Area by Cold Working 

 Chakt 37. — The effect of cold rolling on the hardness of a phosphor 

 bronze (5.27 % tin, 0.09 % phosphorus, balance copper) previously 

 annealed for 2 hr. at 1150°F. according to Cook and Tallis.*'"' 



CR 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.f: (2 Hn at Temp.) 



Chakt 38. — The effect of annealing on the tensile strength and per- 

 centage elongation in 2 in. of a phosphor bronze (5.27 % tin, 0.09 % 

 phosphorus, balance copper), previously cold-rolled 60 per cent (reduc- 

 tion of area) according to Cook and Tallis.*'"* 



220 

 200 

 180 

 160 

 140 

 120 

 100 

 80 

 60 

 40 

 20 



CR 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp. in Deg.Ff2.Hr.atTemp.) 



Chaet 39. — The effect of annealing on the Erichsen ductility value 

 and hardness of a phosphor bronze (5.27 % tin, 0.09 % phosphorus, 

 balance copper), previously cold-rolled 60 per cent (reduction of area) 

 according to Cook and Tallis.*'"' 



