[DeTomaso] Schwing-worthy hardware for ZF etc.

[Kirby Schrader]

Julian,

You are indeed correct on the stainless steels. I have to deal with that
everyday in the downhole oil tools business. The yield strength of stainless
will also catch you out if you don't watch it. Typically, they are very
soft, easy to strip, etc.
We typically work with 80ksi and 110ksi 13Cr and 4140 stuff in addition to
Inconel 718.
And my personal favorite MP35N; 180ksi, but expensive. Immune to almost any
corrosion and acid. Stainless steel can be down in the 30's very easily

FWIW,
Kirby

On Fri, Feb 26, 2010 at 14:03, Julian Kift <julian_kift at hotmail.com> wrote:

>
> Also bear in mind Stainless Steel is a whole subset of steels in it's own
> right and there are numerous classifications and grades depending on
> crystalline structure (austentic, ferritic or martensitic) with varying
> contents of nickel, chromium, manganese, molybdenum and carbon (plus others)
> to provide overall desired properties, one being degree of
> chemical/corrosion resistance. Most will be aware common stainless' are 304
> then 316, but quality control out of the likes of China is spotty at best,
> so yes despite the name 'stainless' some can corrode.
>
>
>
> Julian
>
>
>
>
>
>
> > From: MikeLDrew at aol.com
> > Date: Fri, 26 Feb 2010 14:35:29 -0500
> > To: cengles at cox.net
> > CC: detomaso at realbig.com
> > Subject: Re: [DeTomaso] Schwing-worthy hardware for ZF etc.
> >
> >
> > In a message dated 2/26/10 6 11 44, cengles at cox.net writes:
> >
> >
> > >
> > > Yes, they mentioned the extra zinc surcharge if ordered with that. I
> > > didn't think that zinc would be necessary.
> > >
> > >>>All hardware has to be plated with something or else it will rust
> > immediately when exposed to moisture. All fasteners that aren't
> cad-plated, or
> > black oxide, are zinc-plated. When you go through your local hardware
> store
> > and look at all the silver-colored nuts, bolts, screws etc., that's zinc
> > you're seeing.
> >
> >
> > > >I don't believe that Chuck Melton's polished stainless steel acorn
> nuts
> > > have zinc plating and they still look good at the ten month point of
> > > installation.
> > >
> > >>>Uh...duh? You don't have to plate stainless steel because stainless
> > steel is, uh, stainless? :>)
> > >
> > > > Do you think that the zinc coating is needed? It seems to me that the
> > > standard $2.55 stainless steel acorn nut would work just fine.
> > >
> > >>>It would work in the sense that it would keep everything together. But
> > it would rust right away and look like crap--and the sales rep from Zago
> > just confirmed that. I'm awaiting a quote for stainless steel, and will
> > report my findings back to you. :>)
> >
> > Mike
> >
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