The Coppers 



21 



0.002 



0.010 



0.004 0.006 0.008 

 Strain- Inches per Inch 

 Chart 56. — The effect of cold rolling on the stress-strain character- 

 istics of arsenical tough-pitch copper strip (0.040-in. thick) having a 

 ready-to-finish grain size of 0.020 mm. (99.50 % copper, 0.45 % arsenic) ; 

 5,000-lb. capacity hydraulic testing machine and Templin automatic 

 extenaometer accurate to 0.00001 in. used. 



0.012 



0.002 0.004 0.006 0.008 0.010 



Strain - Inches per Inch 

 Chart 57. — The effect of cold rolling on the stress-strain character- 

 istics of arsenical tough-pitch copper strip (0.040 in. thick) having a 

 ready-to-finish grain size of 0.050 mm. (99.50 % copper, 0.45 % arsenic) ; 

 5,000-lb. capacity hydraulic testing machine and Templin automatic 

 extensometer accurate to 0.00001 in. used. 



TABLE 7 

 LEADED COPPER 



General Data — Rod 

 Copper, 99.00%; lead, 1.00% 



Property 



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, %in2in 



Reduction of area, % 



Rockwell hardness F, J^g-™- 1*3,11, 60-kg. load 



Rockwell hardness B, He-in- ball, 100-kg. load 



Modulus of elasticity, p.s.i 



Melting point, °F 



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 



Density, lb. per cu. in 



Type structure 



« Refers to rod cold-dr^wn 50 % ; from a ready-to-finish grain size of 0.030 mm. 

 ' Refers to 1100°F. anneal for 1 hr. 



Hard- 



55 

 38 



48 

 49 

 43 

 50 

 68 

 90 

 52 



Soft* 



35 

 5 



8 

 7 

 6 

 10 

 40 

 30 



15,000,000 



1980 



0.0000177 



98 



221 



0.323 



Two phase, alpha -|- lead 



