Is there any way mercury would get into stainless
steel? I recently ran across a stainless steel tube
supplier who sent his tubes out for 3rd-party testing,
and the testing lab said the tubes were fine for all
RoHS materials EXCEPT mercury, where it had more than
twice the allowable limit for mercury.
Thanks in advance,
-Camille Good
Portland, Oregon
--- Genny Gibbard <[log in to unmask]> wrote:
> Our mechanical engineer said that no, stainless
> steel itself does not contain the banned substances.
> Hexavalent Chromium (Hex-Cr) may be produced during
> the welding process but seems to be only present in
> the fumes emitted during the process and does not
> form in the material itself.
> I haven't heard of Cadmium being an issue with
> Stainless Steel.
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]]On Behalf Of
> Blair K. Hogg
> Sent: 25-Aug-05 2:46 PM
> To: [log in to unmask]
> Subject: Re: [LF] Nuts and Bolts
>
>
> I guess my question should be, are there variations
> of stainless steel or other metal formulations that
> contain more than the allowable limit of cadmium or
> other banned substances? Not the plating, the actual
> metal itself.
>
> Blair
>
> >>> [log in to unmask] 08/25/05 04:40PM >>>
> For RoHS we are ordering only Stainless Steel. Many
> zinc coatings are not compliant, and it isn't worth
> the effort of trying to spec and track that metal
> process for fractions of a cent, at this point.
> Maybe when zinc RoHS options are more common, we'll
> go back, but my impression is many of the hardware
> sources we use are "RoHS?? what's that? It's going
> to cost you..."
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]]On Behalf Of
> Phil Nutting
> Sent: 25-Aug-05 2:35 PM
> To: [log in to unmask]
> Subject: Re: [LF] Nuts and Bolts
>
>
> Our spec to our hardware vendor is either Zinc
> plating or stainless
> steel. Buying cadmium plated screws has been not
> allowed for at least
> the last 10 years at our facility.
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf
> Of Michael McMonagle
> Sent: Thursday, August 25, 2005 11:51 AM
> To: [log in to unmask]
> Subject: Re: [LF] Nuts and Bolts
>
> Lots of inexpensive hardware and metal parts (like
> those used in
> consumer
> products) is cad plated, which doesn't sound
> homogeneous....
>
> Mike McMonagle
> Quality Engineer
> OYO Geospace
> 7007 Pinemont Drive
> Houston, TX 77040
> 713-986-8650
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf
> Of Blair K. Hogg
> Sent: Thursday, August 25, 2005 10:24 AM
> To: [log in to unmask]
> Subject: Re: [LF] Nuts and Bolts
>
> Do any metal formulations commonly used in hardware
> contain cadmium?
>
> Blair
>
> >>> [log in to unmask] 08/25/05 10:23AM >>>
> Can you give a concrete example of a stainless steel
> that is not
> inherently free of "RoHS elements" to the specified
> limits? Doubtless
> you are thinking of hexavalent chromium. But alloyed
> metals cannot be
> said to have any valence; this exists only in
> compounds. They are also
> "homogeneous" (according to the definition), to
> boot.
>
> Brian
>
> Scott Hoeptner wrote:
> > How are different organizations dealing with
> obtaining compliance for
> > hardware "stock" items (ex: screws, washers,
> nuts, etc.)? It seems
> > that the vast majority of distributors of mounting
> hardware buys to
> > industry "spec" and cannot ascertain the true
> source of supply. For
> > example, they seem to take the position that
> stainless steel is
> > inherently free of RoHS elements. How can it be a
> safe bet when they
> > cannot identify specific manufacturer and chemical
> makeup? Any
> > thoughts?
> >
> >
> >
> > Thanks,
> >
> > Scott C. Hoeptner
> >
> > Vice President of Engineering
> >
> > HME
> >
> > phone: (858) 535-6036
> >
> > fax: (858) 535-6019
> >
> > [log in to unmask]
> >
> >
>
>
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