I'm looking to machine a piece of round steel to place a magnet in it and want
the steel magnetic as posible

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On Friday, April 14, 2017 at 6:18:05 PM UTC-7, m hammond wrote:
I'm looking to machine a piece of round steel to place a magnet in it and want
the steel magnetic as posible

Do you want it magnetically soft? Hard? Permeable to AC fields?

The use of a piece of steel as a magnetic pole piece means you want low-carbon
steel, fully annealed (don't work the steel after annealing). There's lots of
other magnetic properties for various situations, like grain-oriented silicon
steel for two-dimensional AC magnetic field circuits.

On 2017-04-15, m hammond wrote:

I'm looking to machine a piece of round steel to place a magnet in it
and want the steel magnetic as posible

I presume that you mean that you want the steel to *conduct* the
magnetism, not to retain a magnetic field, or you would not need to
place a magnet in it.

For that purpose -- a mild (unhardened) steel is good, and
something really expensive, like Mu-metal is much better.

Hardenable steel -- if hardened and cooled with a magnetic field
applied will hold it quite well. Permanent magnets used to be be made
that way. These days, the exotic materials formed with powder metalurgy
or ceramics are better.

Good Luck,
DoN.

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