14 



Copper and Copper-base Alloys 



TABLE 4 

 SILVER-BEARING COPPER 



Type op Product — Strjp" 

 Silver, 10 oz. per ton; copper, 99.95%; phosphorus, nil 



Property 



Hard'' 



Soff^ 



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



Apparent elastic Umit, 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) 



Y'ield strength, 0.1% offset, p.s.i. (000 omitted) 



Elongation, %Ln2in 



Rockwell hardness F, Jf g-in. ball, 60-kg. load 



Rockwell hardness B, J^g-™- ball, 100-kg. load 



Rockwell hardness 15-T, J-f g-in- ball, 15-kg. load 



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



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



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. 



52-58 

 39^6 

 49-57 

 48-55 

 46-52 



4 

 92-95 

 56-64 

 85-86 

 62-67 



15 



33 



5 



6-8 



6 



6 



40 



34 



16,000,000 



1975 



0.322 



0.0000174 



101.6 



228 



' Apply to strip only (all tests conducted on 0.040-i 

 > 6 B. & S. Nos.. hard, 0.035-0.015 mm. grain size 

 = Refer to 1200^. anneal (1 hr. at temperature). 



, stock), 

 ready-to-finish. 



11.0 20.7 29.4 37.2 44.0 500 55.5 60.5 648 68.6 

 Percen+ Reduc+ion of Area by Rolling 

 01 23456789 10 

 B and S Numbers Hard 

 Chart 34. — The effect of cold rolling on the tensile strength and 

 apparent elastic limit of silver-bearing copper strip previously annealed 

 to two different grain sizes (99.95 % copper, 10 oz. of silver per ton) 

 (0.040-in. stock). 



2100 

 to 



"5 90 



70 



= 60 



CQ 



1|£50 

 w 

 S40 



L 30 



= 20 



q: 



11.0 20.7 29.4 372 44.0 50.0 55.5 605 64.8 68.6 

 Percent Reduction of Area by Rolling 

 123456789 10 

 Band S Numbers Hard 

 Chart 35. — The effect of cold rolling on the Rockwell hardness and 

 percentage elongation in 2 in. of silver-bearing copper strip previously 

 annealed to two different grain sizes (99.95 % copper, 10 oz. of silver 

 per ton) (0.040-in. stock). 



