Temperature coefficient of resistance - AISI 302 1

[FilipM]

Hello,

I'm looking for the right temperature coefficient of resistance, at 20°C for Stainless Steel type AISI 302.
E.g. for Copper 100% IACS -> ? = 0.00393

If it's possible, can you give me also the volume resistivity. I think it's 0.730 ? mm2/°C.

Note: some people have told me that the resistivity shall change if the wire is e.g. drawing from 3.00mm to 0.15mm.
Have anyone experience with that. Excist there graphics are figures/formulae about that ?

Thanks in advance for a reply.
Best regards ,
Filip

 

[btrueblood]

Go here:

http://www.alleghenyludlum.com/ludlum/pages/products/xq/asp/P.18/qx/product.html#

and click on the link titled "technical data bluesheet".

Look at page 5.

Although not stated explicitly, I believe the data given applies to annealed material. Cold working (e.g. wire drawing) can/does affect the resistivity, and possibly the TCR also (especially if you are working at temperatures that will allow the alloy to anneal over time). Best to start with annealed material, then the properties will drift less over time. Also, stay away from high temperatures due to oxidation.