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VK2ZRG > TECH 26.05.06 19:04l 51 Lines 2604 Bytes #999 (0) @ WW
BID : 2329_VK2ZRG
Read: DL1LCA GUEST
Subj: Resistivities of metals
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Sent: 060526/0809Z @:VK2WI.#SYD.NSW.AUS.OC #:15673 [SYDNEY] FBB7 $:2329_VK2ZRG
From: VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
To : TECH@WW
VK2ZRG/TPK 1.83d Msg #:2329 Date:26-05-06 Time:8:07Z
Hello Dick and readers,
I've compiled a list of metal resistivities/conductivities from various
sources. CHEMIX is a programme that gives lots of data on all the elements.
It came from the web. CHEMIX gives conductivities, the first column of numbers.
I've taken a reciprocal for the second column and the third column is relative
resistance to copper (1.678). The 4th, 5th and 6th columns come from books.
Radiotron Hbook is "Radiotron Designers Handbook" and Ref data ITT pub is
"Reference Data for Radio Engineers" 4Th Ed. The 7th column is from the list
from Paul M0CNL, posted on packet the other day. The last column is data that
I gleaned fron the Encyclopedia Britannica.
Paul's number of 18 for chromium could be out by a factor of 10. Clearly his
numbers for brass and tin are out be a few orders of magnitude. So I'm still
not sure what the right answer for chromium is. I've yet to find out exactly
what happens to the properties of chromium at 37C.
------- Relative to copper -------- Resistivities
....From CHEMIX programme..... ARRL Radiotron Ref data M0CNL Encylp
M Conduct. Resistivity Hbook HBook ITT pub list Britan
Ag 0.630 1.587 0.946 0.94 0.950 0.950 1.590 1.590
Al 0.377 2.653 1.581 1.60 1.640 1.640 2.650 2.655
Au 0.452 2.212 1.319 1.40 1.416 1.416 2.440 2.440
Co 0.172 5.814 3.465 5.600 5.600
Cr 0.077 12.920 7.700 1.80 18.00 13.00
Cu 0.596 1.678 1.000 1.00 1.000 1.000 1.673 1.682
Fe 0.093 10.753 6.409 5.68 5.600 5.600 9.660
Ni 0.143 6.993 4.168 5.10 5.050 5.050 0.000 10.51
Pb 0.048 20.833 12.417 12.80 12.78 12.78 22.00 20.65
Pt 0.096 10.417 6.208 6.160 6.160 11.00
Rh 0.211 4.739 2.825
Sn 0.091 10.989 6.549 6.70 6.700 6.700 1150 11.36
Ti 0.023 43.478 25.913 48.70
V 0.048 20.833 12.417 26.00
Zn 0.166 6.024 3.590 3.40 3.400 3.400 6.00
Brass 3.7-4.9 3.90 3.90 700
Resistivities are in micro ohm-cm
73s from Ralph VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
Taglines by Colin Coker G4FCN
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