motor shaft material
motor shaft material
(OP)
We manufacture a specialty elec. motor that requires the shaft to have good magnetic properties but we also need good corrosion resistance. We've been using 416 stainless steel (7/8" rod). but it is not standing up to the corrosion of the salt water environment.
Question: will 17-4 stainless be ok or perhaps a duplex ss like 2205? How does 430 solenoid grade compare with a 300 series SS?
Thanks!
Question: will 17-4 stainless be ok or perhaps a duplex ss like 2205? How does 430 solenoid grade compare with a 300 series SS?
Thanks!





RE: motor shaft material
You can also use 316L Stainless steel.
RE: motor shaft material
RE: motor shaft material
You might look at 13-8PH, at least it has some Mo in it.
2205 has much better corrosion resistance, but I don't know if it is magnetic enough for you.
I find it hard to believe that your motor is so under designed that removing a magnetic shaft hurts performance.
The 2205 may be enough, I would try it first.
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Plymouth Tube
RE: motor shaft material
13-8 may have a little better corrosion at sea water than 17-4, especially in H 950 condition. However, although being better than 430, 416, both 17-4 and 13-8 are still restricted in sea water.
RE: motor shaft material
RE: motor shaft material
If keeping in salt water all the time, Ni plating is still not sufficient.