[TheForge] Stainless contamination

[gblacksmith]

Folks:  In the world of SS cutlery, 13% chromium is generally considered the 
cutoff for true stainless steels.  "Semi -Stainless" D-2 is typically 11%. 
I have forged ATS-34 blades and have not had rusting problems, even w/o 
passivation.  I suspect this is because I have not heated the material to a 
welding heat.

    Some also contain a smaller amount of nickel.  Most of your high 
performance stainless alloys are the "duplex" type that are often 18% 
chromium and 8% nickel.  These are really corrosion resistant and are used 
in hot liquid service applications.  Above that are alloys that are used in 
the nuclear industry for liquid piping...so I have been told.

----- Original Message ----- 
From: "Ron Childers" <munlaw2 at hcsmail.com>
To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
Sent: Wednesday, August 24, 2005 8:46 AM
Subject: RE: [TheForge] Stainless contamination


> Bruce,
>
> You are correct; we weld tangs on ss shafts for spear fishing under salt
> water and they have never rusted even after 40 years.
>
> Ron C
>
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net
> [mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bruce Freeman
> Sent: Wednesday, August 24, 2005 9:57 AM
> To: theforge at mailman.qth.net
> Subject: Re: [TheForge] Stainless contamination
>
> Well, this is the difficulty.  There are lots of alloys called "stainless
> steel".  Presumably, some are better than others at resisting rusting, 
> even
> without passivation.
>
> Bruce
>
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