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Originally Posted by mpierich
Hmmm...so you're saying a magnet won't stick to true stainless? Not doubtig you, just want to be sure I understand correctly.
You're right about the costs...this is just a kickstart lever off an ATV. He claims he's seen them polished, but I would bet he saw plated ones.
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If you were to compare 409 stainless with say, 304 stainless, what you'd see is that the 304 stainless is basically "diluted" with a higher concentration of other alloys than the 409. 304 stainless typically contains between 14%-17%
chromium and usually about %4-%5 nickel. Anytime you increase the ratio of non carbon metals to carbon in any substrate, after you get to a certain point the carbon will become "buffered" enough that the substrate looses it's ferritic properties. 400 series stainless is right there on the ragged edge of having
juuuust enough chromium and nickel that it's corrosion resistance is improved over standard mild steel, but still has a high enough carbon ratio that it will hold a magnet. Subsequently, as far as carbon density is concerned, this same logic also explains why steel can always be made into a more powerful magnet than say, iron. Hopefully this sheds some light on the "true stainless" question.
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Originally Posted by mpierich
Anyhow, he wants it polished regardless. The customer is always right, as long as he pays his bill, eh?
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You are the professional. If a customer chooses to ignore your advice or professional opinion, he's going to pay one way or another. May as well be you he pays.
