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Temperature Coefficient of Resistance of Brass

Temperature Coefficient of Resistance of Brass

Temperature Coefficient of Resistance of Brass

(OP)
I have found the temperature coefficient of copper (.00393 per degree C @ 20 degree C) but I also need the value for CDA 26000 and CDA 24000 brasses.  I've searched all over and found several places that state "brass .002" but I need to be more precise than that.  I know the alloy will make a significant difference.

RE: Temperature Coefficient of Resistance of Brass

(OP)
Close but no cigar.  That's thermal coefficient of expansion, not resistance.  I see I left the key word resistance out of my post although it is in the title.  Sorry about that.  I'm pretty sure at this point that CDA 24000 is about .0016/deg C and CDA 26000 is about .0010.  I think I will just have to run some experiments to confirm it.

RE: Temperature Coefficient of Resistance of Brass

Ah, I shoulda known better -- this is an electrical forum not a thermal one...

ko  (www.ecooling.biz)

RE: Temperature Coefficient of Resistance of Brass

kaye and Laby used to be a useful book - now available online

http://www.kayelaby.npl.co.uk/

unfortunately it only lists brass, not alloys of........

RE: Temperature Coefficient of Resistance of Brass

(OP)
That is a nice resource even if it does not have what I need.  I got the following from a supplier:

26000 TCR:  .00153/deg C @ 20 Deg C
24000 TCR:  .00161/deg C @ 20 Deg C

My on tests at 20 and 100 degrees C yeilded:
Copper .00389 (agrees well with the published .00393)
26000  .00144
24000  .00159

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