282 



Copper and Copper-base Alloys 



140 

 130 



120 

 c 

 crllO 



b 100 



O- 



6 90 

 o 

 § 80 



k '' 



1 60 

 c 50 



.0 50 



^20 

 c 

 o 

 [I] 10 







UIHmafe fen site sirengihs 



i f 



Q 10 Jo proof sfrengfh^ 



V 



^ 



z 



/ 



/ 



^ 



/ 





.^ 



^ 



/' 



7" 



V ^'^ 



^ 





-^^ 



^ 



\ 



^^ 



/^ 



/' 



z^ 



7" 



A. 



^ 



/ 



A 



v^ 



\^ 



/ 



-/^ 



/ 



y^ 



/ 



y- 



/ 



/ 



y 



imif of proporfiona/ify 



js: 



Elongafion 



\ 



"v.. 



90 



10 20 30 40 50 60 70 80 

 Percent Reduc+ion in Area by Cold Working 



Chart 44. — The effect of cold rolling on the tenaile strength, proof 

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

 phosphor bronze (7.31 % tin, 0.02 % phosphorus, balance copper) 

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

 Tallis.(3o) 



260 

 240 

 220 

 200 

 180 

 160 

 .2 140 

 w 120 



VI 

 (U 



-§'00 



I 80 



60 



40 



20 









^ 



/- 



Cr 



V 



/Lc 



ly 



Diamo rtd pyram id 



/ 



-r 



.d 



^ 



/ 



/ 



:^ 



■y^. 



x^ 



Brinell, 10 kg., fmm. 



Rockwell, 100 kg., g "ball. 



Rockwell, lOOkq.jf ball 



"shore sc 



leroscopsj 



^=r 



r^ 



. S. S J. Shore scleroscope, U.H. 



<S self- recorder I I 

 _J 1 L_J \ I 



10 20 30 40 50 60 70 80 90 

 Percent Reduction in Area by Cold Working 



Chart 45. — The effect of cold rolling on the hardness of a phosphor 

 bronze (7.31% tin, 0.02% phosphorus, balance copper), previously 

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



120 

 C 

 D-llO 



oi 100 



2 80 



r: 70 



■Z_ 60 

 8 50 



40 



30 



20 



CR 400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Terrip. in Deg.l\C2 Hr. a+ Temp.) 



Chart 46. — The effect of annealing on the tensile strength and per- 

 centage elongation in 2 in. of a phosphor bronze (7.31 % tin, 0.02 % 

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

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



240 

 220 



200 



180 



160 



E140 

 o 



>-l20 



Q- 



"gioo 



o 

 E 80 



^^60 



40 



20 



CR 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg.F fZHna+Temp.) 



Chart 47. — The effect of annealing on the Erichsen ductility value 

 and hardness of a phosphor bronze (7.31 % tin, 0.02 % phosphorus, 

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

 according to Cook and Tallis.'^"' 



