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is Nichrome magnetic ? what is its relative permeability ?
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metebalci:

I have not been able find the relative permeability of Nichrome (Ni80Cr20) yet. Is it magnetic or not (or negligible mu_r~1) ?
Berni:
Manufacturers of nichrome say it is non magnetic on the internet. Some say it is faintly magnetic.

Something being magnetic or not can be quite complicated. Nickel in itself is feromagnetic, but just because a alloy has a feromagnetic element in it does not automatically make the alloy also feromagnetic.

For example stainless steel is mostly iron, yet most kinds of stainless steel are pretty non magnetic. To make things even weirder, some kinds of non magnetic stainless will become magnetic once you stress it by bending it. You can see this effect on stainless steel forks or spoons, magnets don't stick to the handle, but they do stick to the eating end due to having gone trough pressing into shape.
metebalci:

--- Quote from: Berni on February 27, 2024, 01:39:23 pm ---Manufacturers of nichrome say it is non magnetic on the internet. Some say it is faintly magnetic.

Something being magnetic or not can be quite complicated. Nickel in itself is feromagnetic, but just because a alloy has a feromagnetic element in it does not automatically make the alloy also feromagnetic.

--- End quote ---

I will assume non magnetic then, until I see any number for permeability.


--- Quote from: Berni on February 27, 2024, 01:39:23 pm ---For example stainless steel is mostly iron, yet most kinds of stainless steel are pretty non magnetic. To make things even weirder, some kinds of non magnetic stainless will become magnetic once you stress it by bending it. You can see this effect on stainless steel forks or spoons, magnets don't stick to the handle, but they do stick to the eating end due to having gone trough pressing into shape.

--- End quote ---

That is interesting, I didnt know.
TimFox:
Nichrome is paramagnetic. 
Its permeability is hard to find through Google, but a Chinese vendor quotes 1.09 +/- 0.05.
My copy of the “rubber bible” (CRC Handbook of Chemistry and Physics) is in storage:  you could check it at your library.
metebalci:

--- Quote from: TimFox on February 27, 2024, 03:52:47 pm ---Nichrome is paramagnetic. 
Its permeability is hard to find through Google, but a Chinese vendor quotes 1.09 +/- 0.05.
My copy of the “rubber bible” (CRC Handbook of Chemistry and Physics) is in storage:  you could check it at your library.

--- End quote ---

Indeed hard to find. Meanwhile, you answered another question I have, the name of the catalog for material properties, thanks.
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