Drinking Water Magnet

[Dave2015]

Hey everyone,

I am not the best with magnets yet but I'm learning. That being said, I have a project I'm working on that uses a ceramic magnet core covered in a 430SS jacket. The jacket is wedged into a tube like a torpedo. This will have 180F water or other food items pushed around it through the tubing. I am having a hard time locating 430 in a bar form. Are there other steels out there that are: equally (magnetically) permeable, equal or more corrosion resistant, Food safe, and easy to obtain?

Thanks,

DC

 

[EdStainless]

Not really. Your choices for ferritic stainless grades is very limited.
You might be able to find tube and sheet and weld a can, that you would then need to anneal.

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P.E. Metallurgy, Plymouth Tube

 

[dgallup]

430F is readily available in bar form. Valbruna & Carpenter make some specialty alloys that are similar but they tend to be even less available. You can always electroless nickel plate low carbon steel. What is the point of a magnet in a water filter?

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[Dave2015]

Well I used water as the example but it could be many things. Mostly food stuff. Primarily its to pick up ferrous contaminants. Sometimes they get used in pump trucks and the like. The problem is, since it's not always water, I need as good of a corrosion resistance as possible. Doesn't 430F suffer in that realm compared to 430? I'm having trouble finding reliable info on it.

 

[MagBen]

Check it out with Carpenter that routinely makes both 430 and 430F/430FR bar stocks. you may lose a bit of pitting crevice corrosion due to sulfur content in 430f. permeability pretty much same.
Other options could be chrome core 8 and 12 with less chrome so corrosion is not as good as 430, while magnetics can be better. Check with Cartech too.

 

[EdStainless]

You can get 439 as sheet product, it is a weldable version of 430.
You also might be able to find 444.
But now I'll as the real question, if this is a housing for magnets wouldn't you want a non-magnetic material?

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P.E. Metallurgy, Plymouth Tube