Re: [CR]Re: solder, lead, etc


Example: Framebuilders:Pino Morroni
Date: Tue, 08 May 2007 12:50:10 -0400
To: losgatos_dale@yahoo.com, classicrendezvous@bikelist.org
From: "John Betmanis" <johnb@oxford.net>
Subject: Re: [CR]Re: solder, lead, etc
In-Reply-To: <471104.85799.qm@web30903.mail.mud.yahoo.com>
References: <MONKEYFOOD2BL8wbH2z00001e7b@monkeyfood.nt.phred.org>


There is a directive in the EU to ban lead content (RoHS) and all companies doing business with the EU are being pressured to get the lead out. Most internationally distributed electronics now use lead-free circuit boards. See http://en.wikipedia.org/wiki/Restriction_of_Hazardous_Substances_Directive

It is now hard to find lead/tin solder in Canadian hardware stores. I'd heard that the lead-free stuff requires more heat and doesn't flow as well, but had no trouble with the last stuff I tried. However, when I tried commercially sourcing lead-free solder at work, I could find very little information and no exact composition seemed to be proprietary and in a state of flux.

At 09:20 AM 08/05/2007 -0700, Dale B. Phelps wrote:
>Does anyone use 100% lead-free solder? IS there such a thing?
>
> I know that solder with relatively higher % of tin has a lower melting point than solders with more lead in them, but in my business (space/aerospace) there's a movement to get away from tin because of certain funny properties it has over time.
>
> We used to use lead sticks (70-80% lead) as a filler on cars, some guys still do, especially on "real" classics (read: 7 or 8-figure "golden age" handbuilts.)
>
> I guess I am wondering when "lead" becomes "solder" in the frame-builder's lexicon, or if I should be wondering more about when the nubbly campy shifters were smoothed out -smile-
>
> Dale "got a dent that needs repair but not filling" Phelps
> Montagna lunga Colorado
>
>
>Dale B. Phelps
>303.651.7307

John Betmanis
Woodstock, Ontario
Canada