Table III-2. Properties of Conductor Materials 



Aluminum 



Specific 

 Gravity 



Tensile 

 Strength 



Dsi 



Elonga- 

 tion % 



P.e sis- 

 tivity 

 microhm- 

 cm-^ 



Conduct- 

 ivity % 



Applications 

 Requiring 



Remarks 



2.7 



35,000 



Pure Metals 

 30-45 1 2.8264 



1 



i 



67 



Minimal 

 Weight 



Low Modulus, High 

 Coefficient of 

 Expansion, Nick 

 Sensitive 



Copper 



3.99 



35,000 



10-35 



1.724 



100 



Normal 

 Service In- 

 stallations 



Excellent General 

 Properties, Eco- 

 nomical 



Molybdenum 



10.2 



100,000 



5.7 



30 



Flexibility 

 Strength 



Strength Member 

 for Stranded 

 Conductor 



Sodium 



0.97 



Virtually 

 that of the 

 insulation 



14-43 



4.88 



35 



Burial , 

 Messenger , 

 Supported 

 Aerial Wires 



Low Cost, Pre- 

 sents Sodium Fire 

 Hazard 



Beryllium 

 Copper 



8.23 



58,000- 

 200,000 



Copper Alloys 

 1-35 1.19 



90 



Strength, 



Flexibility, 



Noncorrosive 



Relatively 

 Expensive 



Bronze 

 (Phosphorus 



8.89 



40,000- 

 60,000 



3-47 



3.6 



48 



Severe 

 Service , 

 Strength, 

 Flexibility 



Rapid Flexing 

 Recovery 



Cadmium 

 Copper 



8.89 



38,000- 

 90,000 



1.5-4 



2-4 



40-85 



High 

 Strength and 



Temperature 





Cadmium 



Chromium 



Copper 





60,000- 

 110,000 



1-8 



1.9-2.2 



80-90 



High 



Strength , 

 Temoerature , 

 Flexibility 

 and 

 Conductivity 



Easily Fabricat- 

 ed, Compatible with 

 riuorocarbon 



Chromium 

 Copper 



8.89 



41,000- 

 90,000 



1.5-2.8 



2-3 



58-86 



Flexibility, 



Strength 





Tellurium 

 Copper 



6.25- 

 8.89 



40 ,000 + 







Strength , 

 Corrosive, 

 Resistance , 

 H i gn 

 Temoerature 



Availability 

 Restricted 



Zirconium 

 Copper 



9.27 



56,000 



25 



1.9 



90 



Strength , 

 Flexibility- 



Noncorrosive 



Copper 

 Covered 



Steel 



7.8 



100,000- 

 200,000 



CI 



ad 



4 .5-5.5 



30-40 



Strength 





Silver/ 

 nickel/ 

 Coooer 



9.0 



150,000 









Strength, 



High 



Temoerature 



Noncorrosive 



Copper 

 Aluminum 



2.7 



38,000 



1-10 







Minimal 

 Weight 



Low Strength, 

 Lew Flex Life, 

 Susceptible to 

 Galvanic Corro- 

 sion 



Tin 



7.3 



4,000- 

 5,000 



Coat 



ings 



15.0 



Corrosion 

 Protection 



Excellent 

 Solderability 





11.5 



Lead 



11.34 

 | 



2,600 



3,300 





22.5 



7.8 



Corrosion 

 Protection 



Nominal 

 Solderability 



Zinc 



7.2 



7,000- 

 30,000 





5.7 



30.0 



Corrosion- 

 Protection 





Silver 



10.6 



42,000 



j 1.64 



105.0 



High 



Expensive 



Gold 



19.3 



18,000- 

 32 ,000 



1 2.19 

 i 



~7~3Tu" 



Corrosion 

 Protection 



Very Expensive 



22 



