Re: [PSUBS-MAILIST] Horizontal Pressure Hull Weldment Supports?

["Sean T. Stevenson" <cast55@telus.net>]

As with most engineering questions, the answer to yours is "it depends".  
Austenitic stainless steels are inherently almost non-magnetic.  AISI Types 
316 and 316L (or the corresponding casting specification CF-8M) have a 
magnetic permeability of about 1.008, which is almost negligible.  Where this 
behaviour can change is with significant cold working such as drawing (as is 
the case in the manufacture of wire rope), which forms martensite in the 
steel and changes its magnetic behaviour.  316 is quite resistant to this, 
but still can exhibit some magnetic response after cold working / hardening.  
Fortunately, this can be eliminated if the material is returned to the fully 
austenitic condition by stress relieving it after working.

-Sean



On Thursday 11 January 2007 05:09, Bob Duncan wrote:
> Hello,
>     Will 316 SS attract a magnet? It may not be necessary in his case. I
> was looking for SS wire rope to hold a pilot wheel pedistal to a mast. The
> compass sits on the pedestal. I brought my pocket magent to West Marine,
> and it seemed intresting to me that one size of their SS cable attracted
> the magnet and the other size didn't. Both spools had the same advertizing
> on them, the only differnce in the writing was the size cable (wire rope).
> I used nylon strap.
>
>     Bob



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