Looking for advice on permaible metals
Looking for advice on permaible metals
(OP)
I need a decently permeable metal that is at least as good as 1018 steel or stainless 416. There is a metallurgical worker who had a special blend
of stainless called AL631-17CR 7NI. Here is the analysis C .072; MN .74; P.019; S.001; SI .480; CR 16.59; NI 7.22; AL .810; MO .280; CU .440; TI .04. I need to know if this stainless steel can be used. FEMM Does not have it in the library.
of stainless called AL631-17CR 7NI. Here is the analysis C .072; MN .74; P.019; S.001; SI .480; CR 16.59; NI 7.22; AL .810; MO .280; CU .440; TI .04. I need to know if this stainless steel can be used. FEMM Does not have it in the library.
RE: Looking for advice on permaible metals
So in the annealed case the permeability would be very low. Hardened it will go up but probably not as much as you want. I have no mag prop data for it, try contacting Carpenter, they could at least test it for you if you promise to buy 20,000 lbs.
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RE: Looking for advice on permaible metals
"Custom 631 AISI Type 631" was not designed for magnetic applications.
RE: Looking for advice on permaible metals
When you age it it becomes very ferromagnetic.
So if you need an assemble that is both magnetic and non-magnetic (think two cores on a common shaft) you can machine the part, age it, then induction anneal a ring in the center and you end up with two solenoid cores attached to each other and magnetically isolated without and brazing to mechanical fasteners.
But it is crap for a non-magnetic material.
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Plymouth Tube
RE: Looking for advice on permaible metals
Carpenter makes ferritic Stainless steels specially for magnetic applicaitons: Chrome Core 8, 12, 13, 18 (Cr content) and 430F for solenoids and Fuel injectors applications. max permeability can be as high as 3,000 (8 and 12Ni). 18Ni Chrome core has a max perm 1,500.