The Coppei's 



23 



HD 400 500 600 700 800 900 1000 IIOO 1200 1300 

 Annealing Temp. Deq.F. ( 1 Hr. at temp) 



Chaht 62. — The effect of annealing on the Rockwell hardness, 

 percentage elongation in 2 in., percentage reduction of area of leaded 

 copper rod previously cold-drawn SO per cent (reduction of area) from 

 material having a grain size of 0.030 mm. (rod under 1 in. in diameter). 



CD 400 500 600 700 800 900 1000 1100 1200 1300 

 Temp. Deg.F. (1 Hr. at temp.) 



Chart 63. — The effect of annealing on the yield strength of leaded 

 copper rod previously cold-drawn 50 per cent (reduction of area) from 

 material having a grain size of 0.030 mm. (rod under 1 in. in diameter). 



TABLE 8 

 TELLURIUM COPPER 



General Data — Rod 

 Copper, balance; tellurium, 0.45% 



Property 



Hard" 



Soft' . Forgings hot 



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, % 



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



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



Modulus of elasticity, lb. per sq. in 



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 



Forging range, °F 



Forging quality 



Type structure 



• Refers to rod cold-drawn 50 % ; rod under 1 in. diameter ready-to-finish grain size 0.025 



* ReferB to llOO^F. anneal (1 hr. at temperature). 



53 



42 

 49 

 50 

 45 

 7 

 22 

 86 

 48 



7 



7 



7 



40 



46 



40 



33-35 



4-9 



6-12 



5-11 



4-8 



40-43 



50-30 



30-45 



16,000,000 



1980 



0.0000177 



98 



221 



0.323 



1250-1450 



Good 



Two phase, alpha -|- copper teUuride 



