4H 



Table 488 

 CONDUCTIVITY AND RESISTIVITY OF MISCELLANEOUS ALLOYS 



TEMPERATURE COEFFICIENTS 



Conductivity in mhos or 



ohms per cm 3 



i = 70(1 — at + bt-) and resistivity in microhms —cm 

 po(l + at - A 2 ). 



Metals and alloys 



Composition by weight 



58.3 Au + 26.5 Cu + 15.2 Ag 



66.5 Au + 15.4 Cu + 18. 1 Ag 



7.4 Au + 78.3 Cu + 14.3 Ag 



a X 10 s 



Gold-copper-silver 



Invar 



Welding iron 



Woods metal 



Brass 



" hard drawn. 



" annealed . . . 

 German silver. . . . 



0.05% Cu 



56Bi,i7Cd,i4Pb,i3Sn. 



Various 



70.2 Cu + 29.8Zn 



Aluminum bronze.. 

 Phosphor bronze . . 

 Silicium bronze. . . . 

 Manganese-copper . 

 Nickel-manganese- 

 copper 



Various 



60.16 Cu -f 25.37 Zn + 

 14.03 Ni -f- .30 Fe with trace 

 of cobalt and manganese 



30 Mn + 70 Cu. 



Nickelin. 



Patent nickel 



Rheotan . 



Rheotan 



Copper-manganese- 

 iron 



Copper- manganese- 

 iron 



Copper-manganese- 

 iron 



Therlo 



Manganin 



Constantan 



3 Ni 4- 24 Mn 4- 73 Cu 



18.46 Ni 4-61.63 Cu 4- 

 19.67 Zn 4- 0.24 Fe -f- 



0.19 Co + 0.18 Mn 

 25.1 Ni -f 74-41 Cu 4- 



0.42 Fe -f 0.23 Zn 4- 



0.13 Mn 4- trace of cobalt 

 53.28 Cu -f 25.31 Ni 4- 

 16.89 Zn 4- 446 Fe 4- 



0.37 Mn 

 53 Cu,25Ni,i7Zn,5Fe 



91 Cu -f 7-i Mn -f i-9 Fe 



70.6 Cu 4- 23.2 Mn 4- 6.2 Fe. 



69.7 Cu 4- 29.9 Ni 4- 0.3 Fe. . 



85 Cu,i3Mn,2Al 



84 Cu -f 12 Mn 4- 4 Ni 



60 Cu + 40 Ni 



7-58 



6.83 



28.06 



1-33 

 6.25 



i-93 



12. 2-15.6 

 12.16 

 14-35 

 3-5 



3-33 



7-5-8-5 

 10-20 



4i 

 1. 00 



2.10 



3.01 



2.92 



1.90 



2.24 



4.98 



1.30 



2.60 

 2.24 



2-3 

 2.04 



574* 



529t 

 1830* 

 2000 

 6000 

 2900 

 -2 X io 3 



360 

 600 



40 



—30 



300 



190 



410 



280 



120 



22 



120 



10 



6 



13.2 



14.6 

 3-6 



75 



18 



52 



6.4-8.4 



8.2 



7.0 



20-33 



30 



12-13 

 5-10 

 2.4 

 100 



48 



33 



34 



53 

 45 

 20 



77 



38 

 46.5 

 44 

 49 



1 Matthiessen. 4 Feussner and Lindeck. 



2 Various. 5 Van der Ven. 



3 W. Siemens. 6 Blood. 



*, f, t b X 10 9 = 924, 93, 7280. 



7 Feussner. 



8 Jaeger-Diesselhorst. 



9 LeChatelier. 



10 I.C.T. 



11 Weber. 



12 Niccolai. 



Smithsonian Tables 



