Copper and Copper-base Alloys 



TABLE 1 

 ELECTROLYTIC COPPER (TOUGH PITCH) 



General, Data — Rod 

 Copper, 99.03%; oxygen, 0.04%; phosphorus, nil; silver, nil 



Property 



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



Rockwell hardness B, J-fg-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 



55 

 40 

 48 

 49 

 43 

 10 

 45 

 15 

 90 

 55 

 194 



33-36 



4-8 



8 



7 



6 

 50-^5 

 60-40 



10 

 25-65 



35-50 

 8-35 

 22^6 

 21^5 

 10-40 

 40-10 

 60-50 

 12-15 

 65-85 

 15-50 

 60-83 



40-60 



16,000,000 



1250-1450 



Good 



Single phase, alpha 



55 

 44 

 50 

 45 

 44 

 5 

 40 

 15 

 90 

 55 



General Data — Strip 

 Copper, 99.92%; oxygen, 0.05%, 



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, Jl'e-in. ball, 60-kg. load 



Rockwell hardness B, i-je-m. ball, 100-kg. load 



Rockwell hardness G, }{s-m. ball, 150-kg. load 



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

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

 Endurance limit (at 10* reversals):"'* 



Soft, p.s.i. (000 omitted) 



2 B. & S. Nos., p.s.i. (000 omitted) 



8 B. & S. Nos., hard, p.s.i. (000 omitted) 



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



Hard' 



52-55 



4 

 40-45 

 48-51 

 48-51 

 45-48 

 91-93 

 53-57 

 18-22 

 80-81 

 57-59 



11 

 13 



14 



Soft/ 



16,000,000 



Physical Data 



Melting point, °F 1981 



Coefficient of expansion, per °C. from 25-300°C 0.0000177 



Electrical conductivity,'"' % I.A.C.S, 68°F 101.6 



Thermal conductivity,"" B.t.u. per sq. ft. per ft. per hr. per °F., 68 °F 227 



Density, lb. per cu. in 0.322 



Available Creep Data"' 



(Electrolytic tough-pitch copper; fully annealed) 



At 400°F. a stress of 3,100 p.s.i. is required to produce a rate of creep per 1,000 hr. of 0.01% 



At 480°F. a stress of 6,700 p.s.i. is required to produce a rate of creep per 1,000 hr. of 0.10% 



Superior numbers in parentheses in tables refer to the numbered items in the Bibliography, page 331. 

 " Refers to rod previously hard-drawn 50 % ; rod under 1 in. in diameter, ready to finish grain size 0.030 mm. 

 *■ Refers to 1100°F. anneal for 1 hr. 



*= Material cold-forged from soft rod (5 to 40% reduction). 

 •* Material cold-forged from Id-worked condition (40%). 



* 6 B. & S. Nos., hard, 0.045—0.015 mm. grain size at ready-to-finish, respectively. 

 ' Refers to 800°F anneal (1 hr. at temperature). 



