OK, those don't really talk about the specifics of 6061.
Also, 0.5% Pb is not good enough. The level is 0.4%. I'm a little
concerned, now.
And from the previous response given by Lester, the problem is, a little
company is the last one to want to sign off on a legal sounding
statement if they can't absolutely verify it. One wrong case that might
come back to bite them could put them out of business for good.
They are not going to sign something just because I tell them that
there's no problem.
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Kallin, Dan
Sent: August 10, 2006 2:57 PM
To: [log in to unmask]
Subject: Re: [LF] Metal compliance
My understanding is lead is generally added for machining aluminum.
Here is a short article summarizing lead use in 2002
http://www.secat.net/answers_view_article.php?article=New_Alloys_Get_the
_Lead_Out_of_Free-Machining_Aluminum.html
Also. From
http://www.key-to-metals.com/Article55.htm
Lead. Normally present only as a trace element in commercial-purity
aluminum, lead is added at about the 0.5% level with the same amount as
bismuth in some alloys (2011 and 6262) to improve machinability.
Dan Kallin
Phone: 978.371.4155 Fax: 978.371.2468
Mobile: 978.760.0779
[log in to unmask]
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Thursday, August 10, 2006 1:32 PM
To: [log in to unmask]
Subject: [LF] Metal compliance
Anyone else having major difficulties getting RoHS compliance statements
out of your metalwork suppliers?
We have companies that provide things like chassis parts, custom
standoffs, etc. They are made of things like 6061 Aluminum, stainless
steel, etc. These are things that can use the exemption:
6. Lead as an alloying element in steel containing up to 0.35 % lead by
weight, aluminium containing up to 0.4 % lead by weight and as a copper
alloy containing up to 4 % lead by weight.
However, our metalwork vendors are having trouble getting any sort of
statement out of their raw materials suppliers, so they are reluctant to
issue statements to us.
I don't know if it would be an unlikely thing to have higher than the
0.4% Pb in aluminum, or if you need to have some carefully controlled
source of aluminum in order to achieve that.
Any thoughts?
As always, your help is much valued and appreciated.
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