Nickel Silvers 



197 



TABLE 4 

 18 PER CENT NICKEL SILVER (DEEP DRAWING) 



General Data — Stkip" 

 Copper, 66.00%; nickel, 18.00%; zinc, 17.00 So 



Property 



Tensile strength, p.s.i. (000 omitted) 



Elongation, % in 2 in 



Apparent elastic limit, p.s.i. (000 omitted) 



Yield strength, 0.5 % extension, p.s.i. (000 omitted) 



Yield strength, 0.2 % offset, p.s.i. (000 omitted) 



Yield strength, 0.1 % offset, p.s.i. (000 omitted) 



Rockwell hardness F, }>{g-ui. ball, 6C-kg. lead 



Rockwell hardness B, J^e-in- hall, ICO-kg. load 



Rockwell hardness G, }{g-hx. ball, 150-kg. load 



Rockwell hardness 15-T, }{Q-m. ball, 15-kg. load 



Rockwell hardness 30-T, He-in- ball, 3C-kg. load 



Young's modulus of elasticity, p.s.i 



Melting point, °F 



Density, lb. per cu. in 



Coefficient of expansion, per °C. from 25-3C0°C 



Electrical conductivity, % I.A.C.S., 68°F 



Thermal conductivity, B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 

 Specific gravity 



Soft' 



" All tests conducted on 0.040-in. stock. 



'' 6 B. & S. Nos., hard, 0.070-0.015 mm. grain size at ready-to-finish, respectively. 



» Hefer to 1100°F. anneal (1 lir. at temperature). 



110 

 100 

 90 



20 



1 1.0 20.7 29.4 372 44.0 5Q0 55.5 60.5 64.8 68.6 

 Percent Reduc+ion of Area by Rolling 

 01 2345 6789 10 

 BS-S Numbers Hard 

 Chakt 17. — The effect of cold rolling on the tensile strength and 

 apparent elastic limit of IS per cent nickel-silver strip, previously 

 annealed to two different grain sizes, 0.015 and 0.070 mm. (66.00 % 

 copper, 18.00 % nickel, balance zinc) (0.040-in.stock). 



11.0 2Q7 294 372 44.0 500 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 2 3456789 10 

 BSS Numbers Hard 

 Chaht 18. — The effect of cold rolling on the Rockwell hardness and 

 percentage elongation in 2 in. of IS per cent nickel-sUver strip, pre- 

 viously annealed to two different grain sizes, 0.015 and 0.070 mm. 

 (66.00 % copper, IS % nickel, balance zinc) (0.040-in. stock). 



