212 



Copper and Copper-base Alloys 



100 

 90 

 80 

 70 

 60 



' 50 

 40 



^ 30 



20 



10 

 



0.010 



0.002 0.004 0.006 0.008 



S+rai'n^ Inches per Inch 



Chart 67. — The effect of cold rolling on the stress-strain charac- 

 teristics of 12 per cent nickel-silver strip (0.040 in. thick) having a 

 ready-to-finish grain size of 0.015 mm.; 5,000-lb. capacity hydraulic 

 testing machine and Templin automatic extensometer accurate to 

 0.00001 in. used (66.24 % copper, 11.57 % nickel, balance zinc). 



90 



80 



£ 70 



I. 60 



aj 

 G. 

 .d 50 



I/O 



^-30 

 l- 

 t^ 20 



10 







0.008 



0.002 0.004 0.006 

 Strain^ Inches per Inch 



Chart 68. — The effect of cold rolling on the stress-strain charac- 

 teristics of 12 per cent nickel-silver strip (0.040 in. thick) having a 

 ready-to-finish grain size of 0.080 mm.; 5,000-lb. capacity hydraulic 

 testing machine and Templin automatic extensometer accurate to 

 0.00001 in. used (66.24 % copper, 11.57 % nickel, balance zinc). 



TABLE 9 

 10 PER CENT NICKEL SILVER 



General Data — Strip* 

 Copper, 66.02%; nickel, 10.73%; manganese, 0.15%; 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, }4e-m. ball, 60-kg. load 



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



Rockwell hardness G, Jf e-in- baU, 150-kg. load 



Rockwell hardness 15-T, J^e-m. ball, 15-kg. load 



Rockwell hardness 30-T, He-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., 68°F, 

 Specific gravity 



nard*" 



Soft" 



* All testa conducted on 0.040-in. stock. 



^ 6 B. & S. No3., hard, 0.080-0.015 mm. grain size at ready-to-finish, respectively. 



' Refer to 1300°F. anneal (1 hr. at temperature). 



