TABLES F
CHARACTERISTICS OF CONDUCTOR MATERIAL

Characteristics Annealed Copper Hard drawn Copper Cadmium Copper  Hard drawn Aluminium  Aluminium Alloy Galvanized Steel
Conductivity percent

volume receptivity at 20 C Ohm-mm2/m

Mass receptivity at 20 C Ohm-gramme/m Ohm-pound/mile

Resistance at 20 C Ohm-mm2/km Ohm-inch2/100Y

Density at 20 C grammes/cm3

Weight kg/mm2/cm3 lb/inch2/1000Y

Temperature coefficient of resistance at 20

Coefficient of linear expansion at 20 C per C per F

Ultimate tensile stress (approximate) lb/inch2 kg/mm2

Modulus of elasticity Kg/mm2 LB/inch2

100


0.017241
(standard)


0.15328
875.20

 

17.241
0.024437


8.89


8.89
11562


0.00393

 

17X10-6
9.44X10-6

 

3600
25.3

9 to 10.5X10+3
13 to 15X10+6

 

97
(average)

0.01771
(average)
0.69712

0.15741
898.83

 

17.71
0.025096


0.089


8.89
11562


0.00381



17x10-6
9.44X10-6

 

6000
42.2


12.66X10+3
18X10+6

79.2
(minimum)

0.021769
(maximum)
0.85705

0.19472
111.90

 

21.769
0.030754


8.945


9.945
11634


0.0031

 

17X10-6
9.44X10-6

 

90000
63.3


12.66X10+3
18x10+6

 

61
(minimum)

0.028264
(maximum)
1.1128

0.076398
436.23

 

28.264
0.040059


2.703


2.703
3516


0.00403

 

23X10-6
12.78X10-6

 

23500
16.5


6.96X10+3
9.9x10+6
 

53.5


0.0322
(maximum)
1.2677

0.08694
496.42

 

32.20
0.045637


2.703


2.703
3516


0.0036

 

12.78X10-6
23X10-6

 

44000
29


7X10+3
9.9x10+6

 

----


----

----

----
----

 

----
----


7.78


7.78
10197


----

 

11.510X10-6
64X10-6

 

194000
136


20X10+3
28X10+6