The Cupro-nickels 



227 



TABLE 1 

 70-30 CUPRO-NICKEL 



General Data — Rod 

 Copper, 68.56%; nickel, 30.48%; iron, 0.39%; manganese, 0.57% 



Property 



Rod 



Hard" Soft" 



Forgings 



Hot Cold= Cold'' 



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



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) . . . . 



Elongation, % in 2 in 



Reduction of area, % 



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



Rockwell hardness F, J^e-i"- bS'Ui 60-kg. load 



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



Brinell hardness, 10-mm. ball, 500-kg. load 



Modulus of elasticity, p.s.i 



Forging range, °F 



Forging quality 



Type structure 



85 

 69 

 78 

 78 

 70 

 15 

 75 

 32 



103 

 81 



133 



55-60 



16-20 



14-25 



14-25 



14-25 

 45 



85-80 



22-24 



79-85 



37-50 



72-83 



22,000,000 



1600-1900 



Fair 



Single phase, alpha 



60-80 



33-67 



44-76 



38-75 



37-66 



40-15 



83-76 



22-27 



90-103 



58-80 



92-130 



85 

 67 

 78 

 78 

 68 

 15 

 75 

 32 

 103 



General Data — Tube 

 Copper, 68.94%; iron, 0.26%; nickel, 30.15%; manganese, 0.60%; carbon, 0.049% 



Property 



Hard' 



Soft^ 



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



Elongation, % in 2 in 



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

 Rockwell hardness F, Jie"™- ball, 60-kg. load 

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



General Data — Strip' 

 Copper, 68.94%; nickel, 29.61% 



Property 



TensUe 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) 



2 % offset, p.s.i. (000 omitted) 



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



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

 Rockwell hardness B, }{e-m. ball, 100-kg. load. . . 

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

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

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



Hard" 



Soft' 



Physical Data 



Melting point, °F 2250 



Coefficient of expansion, per °C. from 25-300°C . 0000162 



Electrical conductivity, % I.A.C.S 4.7 



Thermal conductivity, B.t.u. per sq. ft. per ft. per hr. per °F., 68°F 16.7 



Density, lb. per cu. in . 323 



Specific gravity 8 . 96 



Stress relief anneal, °F 555 



Annealing range, °F 1250-1600 



Available Creep Data''' 

 Previous history: cold-drawn to 0.750 in. in diameter, annealed 1022°F., Rockwell B, 72, tensile strength, 64,700 p.s.i.; 

 0.50%, yield strength, 48,300 p.s.i.; %, elongation in 2 in., 37; % reduction of area, 65. 



At 750°F. a stress of 9,100 p.s.i. is required to produce a rate of creep per 1,000 hr. of 0.01 % 

 At 750°F. a stress of 18,800 p.s.i. is required to produce a rate of creep per 1,000 hr. of 0.10% 



See page 226 for footnotes to, table. 



