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# metal permiability

## metal permiability

(OP)
Hi, I am experimenting with a solenoid right now for a project I am working on.

I understand that the magnet strength of the solenoid is increased by the core material's permeability.

I am looking to use an iron core, as I understand that to be highly permeable.

However, for experimenting purposes, I only have access to a local home depot.

They have some plubming tubes which are metal, and also some tubes in the hardware section.

My question is, if I take a magnet to each of those tubes, is it safe to say that the material that has a stronger magnetic attraction to a basic magnet, will be one with higher permeability?

### RE: metal permiability

You need to go back and understand what permiability is.
Is this a DC application?
What you need to know is what field strength the core will be seeing, and maximizing the saturation level at that field strength.
If this is AC then you need to know the field strength as well but focus on permiability.
There is nothing that you can do by hand with a magnet that will tell you this. Unless you set up a measurement system. It can be done but it is tough.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

### RE: metal permiability

(OP)
Thanks for the response.

I appreciate it.

### RE: metal permiability

The answer is yes and no. The magnetic force is not dependent on the permeability. The force is more related to the fux density, if your permanent magent is strong enough to saturate the soft magnet, the tube with a stronger Bs could have a stronger attraction. permeability is kind of sensitivity, higher permeability doesnot necessarily mean a hgiher field strength.

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