Nickel Silvers 



209 



TABLE 8 

 12 PER CENT NICKEL SILVER 



General Data — Strip" 

 Copper, 66.24%; nickel, 11.57%; zinc, balance 



Property 



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



Elongation, %in2in 



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, J-ig-in. ball, 60-kg. load 



Rockwell hardness B, }^g-m. ball, 100-kg. load 



Rockwell hardness G, J^g-in- ball, 150-kg. load 



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



Rockwell hardness 30-T, Ke-in. ball, 30-kg. load 



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



Melting point, °F 



Density, lb. per cu. in 



Coefficient of expansion, per °C. from 25-300°C 



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



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

 Specific gravity 



*» All tests conducted on 0.040-in. stock. 



* 6 B. & S. Nos., hard, 0.080—0.015 mm. grain size at ready-to-finish, respectively. 



e Same as footnote b after 1400°F. anneal for 1 hr. 



Hard" 



Soft" 



!I0 



100 



90 



80 



£ 70 



-60 



8 40 

 o 

 "" 30 



20 



10 



11.0 20.7 29.4 37.2 44.0 50.0 555 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B S^S Numbers Hard 

 Chart 57. — ^The effect of cold rolling on the tensile strength and 

 apparent elastic limit of 12 per cent nickel-silver strip, previously 

 annealed to two different grain sizes, 0.015 and 0.080 mm. (66.24 % 

 copper, 11.57% nickel, balance zinc) (0.040-in. stock). 



100 

 90 

 " 80 

 70 

 60 

 50 

 40 

 JO 

 20 

 10 



11.0 20.7 29.4 37Z 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Arecf by Rolling 

 01 2345 6789 10 

 BS-S Numbers Hard 



Chart 58. — The effect of cold rolling on the Rockwell hardness and 

 percentage elongation in 2 in. of 12 per cent nickel-silver strip, previ- 

 ously annealed to two different grain sizes, 0.015 and 0.080 mm. 

 (66.24 % copper, 11.57 % nickel, balance zinc) (0.040-in. stock). 



