268 

 ao80 



ao60 



Copper and Copper-base Alloys 



Q040 



0.020 



900 1000 1100 1200 1300 1400 



Annealing Temp, in Deg.FOHna+ Temp.) 



Chart 5. — The effect of annealing on the grain-growing charac- 

 teristics of Grade A phosphor-bronze strip, previously cold-rolled 

 6 B. & S. Nos. (SO per cent reduction of area) from two different grain 

 sizes, 0.015 and 0.070 mm. (4.09 % tin, 0.035 % phosphorus, balance 

 copper) (0.040-in. stock). 



100 ;;;:^ 



90 



80 

 70 



d-eo 



CO 



oj 50 



Q- 



5 40 

 o 

 o 

 o 30 



20 



P 



CR 400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg. FT (lHT:a+ Temp.) 

 Chaht 6. — The effect of annealing on the tensile strength and 

 apparent elastic limit of Grade A phosphor-bronze strip, previously 

 cold-rolled 6 B. & S. Nos. (SO per cent reduction of area) from two dif- 

 ferent grain sizes, 0.015 and 0.070 mm. (4.09 % tin, 0.035 % phosphorus, 

 balance copper) (0.040-in. stock). 



T3 

 C 

 ^120 



^110 



o 



(qIOO 



g 90 



_i 



-*80 

 o 



1 60 



40 



30 



= 20 



CR 400 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp in Deg. F. f I Hr. a+ Temp.) 

 Chaht 7. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of Grade A phosphor-bronze strip, 

 previously cold-rolled 6 B. & S. Nos. (SO per cent reduction of area) 

 from two different grain sizes, 0.015 and 6.070 mm. (4.09 % tin, 0.035 % 

 phosphorus, balance copper) (0.040-in. stock). 



100 

 90 

 80 



70 



60 



50 



40 



30 



20 



400 500 600 700 800 900 1000 1100 1200 1300 

 Annealing Temp, in Deg. F^ flHnaf Temp.) 



Chabt 8. — The effect of annealing on the yield strength of Grade A 

 phosphor-bronze strip, previously cold-rolled 6 B. & S. Nos. (50 per 

 cent reduction of area) from a grain size of 0.015 mm. (4.09 % tin, 

 0.035 % phosphorus, balance copper) (0.040-in. stock). 



