Temperature Coefficient of Resistance of Brass

[dgallup]

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.

 

[ko99]

Here's a site that specs brass at 0.0000187 m/m-C:

http://www.matweb.com/search/SpecificMaterial.asp?bassnum=MCUABN01

ko (

http://www.ecooling.biz)

 

[dgallup]

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.

 

[ko99]

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

ko (

http://www.ecooling.biz)

 

[motorspert]

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........

 

[dgallup]

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