resistance of various metals

"Chris W"

Got no idea that a wire's or rod's resistance is * inversely proportional * to its cross sectional area ?

Ever figure out that two similar wires run in parallel have half the resistance of one ???

even by the most humble standards of ham operators.

....... Phil

No chart that I'm aware of, but not difficult to calculate. Find a table of resistivities for metals eg

.calculate fromResistance =3D (resistivity * length) / x-sectional area.Hope= this helpsAl

Easy to calculate from the equation Al gave. Total resistance is the same, total length is the same, so if you have a material that's eight times the resistivity, by the equation it will have to have eight times the cross-sectional area. Simple algebra.

Which means the resistivity chart the OP is looking at is actually the chart he needs -- if he has a calculator, he can divide the resistivity of stainless steel by the resistivity of copper, and that tells him how many times more cross-sectional area he needs.

And a newbie alert if Chris is doing the calculations to determine resistance instead of just calculating ratios -- watch your terms. Charts for resistivity are frequently expressed for CM, circular mils. One circular mil is the area of a circle 1 mil in diameter. This is *not* 1 square mil -- you need to convert!

Good luck with your studies. Chris

#Table_of_resistivities

You will have to look up or determine the resistivity of your specific stainless steel - there are a lot of different stainless steels.

- Don Klipstein ( snipped-for-privacy@misty.com)