Nickel Silvers 



217 



I 



2 c 



- E 



10 20 30 40 50 60 70 80 90 

 Percent Reduction In Thickness 

 Chart 83. — The effect of cold rolling on the percentage reduction of 

 area and percentage elongation in 2 in. of 10 per cent nickel-silver 

 strip (62.62 % copper, 10.05 % nickel, balance zinc), previously annealed 

 at 1450°F. for 2 hr. according to Cook.'"' 



500 600 700 800 900 1000 UOO 1200 1300 1400 J5DD 

 Annealing Temp. i-nl!)e_g.T: { 1 Hr. at Temp.) 



Chart 84. — The effect of annealing on the tensile strength, ErlchsEtt 

 value, and percentage elongation in 2 in. of 10 per cent nickel-silver 

 strip (62.62% copper, 10.05% nickel, balance zinc), previously cold- 

 rolled 60 per cent (reduction of area) according to Cook.'^o) 



TABLE 11 

 6 PER CENT NICKEL SILVER 



General. Data — Strip" 

 Copper, 63.55%; nickel, 5.14%; zdnCj balance 



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, J^s-in. ball, 60-kg. load 



Rockwell hardness B, J^g-in. ball, 100-kg. load 



Rockwell hardness G, He-™, ball, 150-kg. load 



Rockwell hardness 15-T, ^/y^-vn. 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 



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, 0.110-0.015 mm. grain size at ready-to-finish- 



c 1300°F. anneal (1 hr. at temperature) of material described in footnote h. 



Hard* 



Soft" 



