Originally posted by David King
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Stainless steel on Lawrence?
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It would be possible to describe everything scientifically, but it would make no sense; it would be without meaning, as if you described a Beethoven symphony as a variation of wave pressure. — Albert Einstein
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Re-hijacking the thread
Originally posted by David King View PostCarpenter Tech blah blah.
5 soft magnetic alloys in order of cost from lowest to highest:
Iron, Silicon Iron, Ferritic Stainless, Nickel Iron, Iron Cobalt.
In order of Permeability (sensitivity) - Yada yada
In order of strength (Flux Density) -low to high: mumble blah
Is that making any sense to anyone?
Permeability and saturation point are the big ones.
Saturation is the limiting magnetic flux that you can pump through something.
The nickel/iron alloys are highly! permeable but reach saturation early.
Iron-Cobalt alloy properties are reversed respectively.
For real numbers, magnetic stainless like T430 saturates ~15kGauss while ordinary steel (1018 & similar) saturates at 150kGauss. T430 permeability is also about 1/10 that of steel -- it may not conduct magnetism well enough for use in pickups.
HyMu-80 conducts magnetism excellently, permeability ranges 500kG to 1MG, but saturates at low field strengths.
For practical purposes, 1018 steel with a nickel plate on the exposed parts is cheapest and best. Joe Barden blades are made exactly that way.
Pickup Slugs and blades made of HyMu-80 or similar are a pricey solution for use with weak magnets.
With all that, I've ordered a few feet of T416 stainless for fun and games. It's too cheap to reject out of hand.
-drh"Det var helt Texas" is written Nowegian meaning "that's totally Texas." When spoken, it means "that's crazy."
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