Nickel Silvers 



195 



no 



2 100 



-0 90 



80 



70 



= 60 



■^ 50 



w 40 



30 



20 



Room 500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp. in Deg.F;( 1 Hr.a+ Temp.) 

 Chaet 11. — The effect of annealing on the Rockwell hardness and 

 percentage elongation in 2 in. of 20 per cent nickel-silver strip, pre- 

 viously cold-rolled 6 B. & S. Nos. (50 per cent reduction of area) 

 from two different grain sizes, 0.015 and 0.070 mm. (66.11 % copper, 

 21.13 % nickel, balance zinc) (0.040-in. stock). 



90 



70 



-i= 60 

 &■ 

 ^50 



XI 



_j 



o 30 

 o 

 o 

 -~ 20 



10 







500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deq.f^f lHna+ Temp.) 



Chakt 12. — The effect of annealing on the yield strength of 20 per 

 cent nickel-silver strip, previously cold-rolled 6 B. & S. Nos. (50 per 

 cent reduction of area) from a grain size of 0.015 mm. (66.11 % copper, 

 21.13 % nickel, balance zinc) (0.040-iu. stock). 



•£|00 



90 



80 



70 



d 60 

 & 



'^ 50 



1- 

 <u 

 a 40 



A 



o 



S20 



10 







500 600 700 800 900 1000 1100 1200 1300 1400 

 Annealing Temp, in Deg.Tf I Hr. a+ Temp.) 

 Chart 13. — The effect of annealing on the yield strength of 20 

 per cent nickel-silver strip, previously cold-roUed 6 B. & S. Nos. 

 (50 per cent reduction of area) from a grain size of 0.070 mm. (66.11 % 

 copper, 21.13 % nickel, balance zinc) (0.040-in. stock). 



90 



80 



D 70 



CP 



"^ 60 

 <^ 50 



40 



30 



0) 20 



•- 



30 40 50 60 70 80 90 100 



Rockwell Hardness B /leBall 100 Kg. Load 



Chabt 14. — This chart can be employed to determine the approxi- 

 mate tensile strength and percentage elongation of 20 per cent nickel- 

 silver strip (66.11 % copper, 21.13 % nickel, balance zinc) when only 

 Rockwell hardness is known. It is accurate for all thicknesses between 

 0.020 and 0.080 in. within the given limits. 



