234 



Copper and Copper-base Alloys 



TABLE 2 

 80-20 CUPRO -NICKEL 



General Data — Tube 

 Copper, 78.18%; nickel, 20.65%; manganese, 0.51% 



Property 



Soft= 



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



Elongation, % in 2 in 



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

 Rockwell hardness F, Ke-in. ball, 60-kg. load 

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



General Data — Strip" 



Propertj' 



Hard-* 



Soft« 



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) 



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



0.1 7o offset, p.s.i. (000 omitted) 



Endurance limit, p.s.i. (000 omitted) 



Rockwell hardness F, Jie-in. ball, 60-kg. load 



Rockwell hardness B, Kb-™- baU, 100-kg. load. . . 

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

 Rockwell hardness 15-T, Ke-in- ball, 15-kg. load. 

 RockweU hardness 30-T, h'e-in. ball, 30-kg. load. 

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



Physical Data 



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., 68°F. . 



° All tests conducted on 0.040-ui. stock. 



^ Extruded, reduced, and drawn, to ^ by 0.049 in. 



« Same as footnote b after 1300°F. anneal (1 hr.). 



<< 6 B. cSc S. Nos., hard, 0.055-0.015 mm. grain size at ready-to-finish. 



* 1600°F. anneal (1 hr. at temperature) of material described in footnote d. 



2190 

 0.323 

 6.5 

 22 



