Motor Housing vs DIN 1.4470

A reluctance to reveal full details of the application, as indicated in the earlier thread on the material being in contact with wastewater, will confound this thread in the same way it did the earlier one. If it were inappropriate, then either the manufacturer would not be using it or the Engineer would not be selecting it for use in the Client's facility.

Appropriateness depends entirely upon application.

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You do not notice: "appreciably magnetic"

You did not ask for it!

Is it exposed then maybe not.

The manufacturer thinks it is appropriate, otherwise he wouldn't be using it.

http://cr4.globalspec.com/thread/110460/Free-steel-alloy-database-SteelNumber

Do not have any information at all

More precisely, the information is less than the EN 10213 standard

Thanks

This question is related to the Foucault current in the motor housing.

"Appreciably magnetic" was quoted from the EN 10213 standard

Only the original poster knows what this material is to be used to create, which remains withheld from the forum...

Did you not get your answer here?

Material is Used in Wastewater

So this appreciably magnetic, are you worried about steel balls in the poop water being attracted to the housing?

If you had this pump in your water reclamation plant (euphemism for poop factory), and watched it sit there and corrode in the air (I presume that part is in the air, and not in the water), what do you feel caused the corrosion?

More importantly, did you find anything to suggest that this steel has any known SCC mechanisms related to temperature and chemical exposure with mechanical strain and stress? Did the material crack and fail? Did it begin to pit, and you find this annoying?

Have you tried an almost molecularly thin coating of calcium fatty acid salt?

Repeat:

This question is related to the Foucault current in the motor housing.

This is the electromagnetic field.

It is not related to corrosion.

It is not related to "Material is Used in Wastewater".

Hell, it sounds like you are angling to me.

First you pop up with one thread, then another, both asking the same question about appropriateness.....again I ask.....appropriate to what?

Any conductor, magnetic or not will have eddy currents within it if there are magnetic lines moving across it.

Why don't we just cut through the B.S. and get down to what you really want?

The same is: "Is this the appropriate?"

But, The problem to be solved in "Material is Used in Wastewater" is: When submerged in wastewater, DIN 1.4470 has corroded or not. (field of metal corrosion)

The problem to be solved in the "Motor housing 1.4470 vs DIN" is:

Foucault current exists in the motor housing or not (which I think it exists).

If it exists, the engine would overheat (field of electromagnetic)

Then the real question is why do you care? The field is usually something that the motor designers worry about in an effort to minimize the overall losses of the machine. End users would only be concerned if there were any equipment that could be disturbed by the external magnetic field.

Assuming that Foucault currents in the motor housing exists. The engine would overheat. The lifespan of the device decreases. You should use it?

So, the real bottom line is you have the magic answer to this synthetically derived issue up your sleeve? What a magician you are!

How lucky for us average dumb Americans, etc., that we just happened to stumble over your grace's magnanimous brilliance, and see how you shine. There, does that make you feel better?

Aren't Foucault currents and Eddy Currents the same?

Now, I've always had the best luck when specifying pumps and motors, done hundreds of them, when working closely with my pump supplier's engineers. They get paid to know these things.

Eddy currents are everywhere, the problem you are trying to create is whether in this particular case they are large enough to cause excess heating. Why don't you prove by calculation that they will cause a problem since I seriously doubt a competent designer would do such a thing (although stuff happens).

I can't imagine any competent designer designing in losses that would render the motor (not engine, which use combustion) inefficient enough to shorten the life below the class requirements of the motor.

Motors are supposed to make power, not heat.

Foucault currents (also called Eddy currents).

Foucault currents exist in the steel core (rotor and stator) of the engine.

This current heats the steel core and losses generated in the motor.

To minimize this current, steel core (rotor and stator) made from ferromagnetic steel sheets (thin) and stitch them together.

Between the steel sheets is an insulating layer.

In the case of using magnetic materials (eg DIN 1.4470 or iron), the motor housing is cast into a block, I fear that Foucault currents is significant.

So issues that need the help of an electrical engineer in the field of rotating electrical machines.

According to my experience, usually the motor housing made of cast iron or aluminum (non-magnetic).

Has anyone ever seen steel motor housing (or a material other magnetic)