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topic 8486

Constantan Resistivity


Q. Could you please tell me the resistivity of constantan?

John L [last name deleted for privacy by Editor]
- Notting Hill, London, England


A. Constantan's electrical resistivity is 300 Ohms/Circular Mil-Foot, compared to 10.7 Ohms/CMF for 99.99% copper

Joe Rosol
Orbital Sciences Corp. - Greenbelt, Maryland, USA


Q. In English please in OhmMetres would be nice! Thanks :-)

Graham M [last name deleted for privacy by Editor]
- England


A. Try goodfellow on the internet. It gives all the figures (inc. resistivity) for various materials inc. constantan.

J S. [last name deleted for privacy by Editor]
- London, Britain


1337 m8 $3x0r p0$7 |>u|>3. I 0w|\| j00 A11 you p30|\|s

Graham B [last name deleted for privacy by Editor]
Physics - Maidenhead, Berks, UK

Ed. note: It appears that Graham was using a scientific keyboard and the special text encoding that did not survive the trip through the world wide web.


A. The resistivity of constantan is 4.9*10^-7

Mohammed A [last name deleted for privacy by Editor]
Student - England


A. 4.9 x 10^-7

Paul [last name deleted for privacy by Editor]
- Chicago, Illinois, USA


A. 52*10^-8 Ohm meters
I also saw the 49*10^-8 but this said it was "constantan (eureka)"

Nathan J [last name deleted for privacy by Editor]
- Kent, England, UK

Ed. note: Your number differs by 6 percent, Nathan, so it's not a terrible correlation.

December 2, 2010

A. Found experimentally constantan resistivity to be 4.9*10^(-7) so it is correct!

bob r [last name deleted for privacy by Editor]
- Paris France

May 3, 2012

Q. Hi
what is the resistivity of constantan with this alloy:
cu base,59.5103
Zn 0.0014
Pb 0.0022
Sn 0.0047
P 0.0099
Mn 0.843
Fe 0.517
Ni 38.97
Si 0.0292
Mg 0.0182
Cr 0.0052
Co 0.0422
S 0.0082
B 0.0064
C 0.0257
Nb 0.0035
Ri 0.0029
and diameter :1.2 mm

Mohammad Ali Momenzad
- Tehran, Iran

Ed. note -- Gentle Readers: Sorry that the camaraderie & credibility of this particular thread is compromised by the removal of the names of the European participants. One of them, after giving permission to post his name -- rather than asking that his posting or name be removed -- filed a complaint under European data protection laws. The law compels us to remove the names of all European participants in this event. Apologies.

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