Hey! Didn't those Sunbeams have Ford 289s? Jason Gregory Manufacturing Engineer Innova Electronics (281)653-5593 (281)653-5594 fax (281)212-0844 cell [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Bloomquist, Ken Sent: Friday, May 06, 2005 8:45 AM To: [log in to unmask] Subject: Re: [TN] NTC Flux Cored Solder Shelf Life Hi Mike, Are you one of those fanatical restoration guys? I've heard of using upholstery from the same year as your car but solder is carrying it a little too far. I have a 1960 Sunbeam Alpine. Do you have any 45 year old solder I could borrow? Happy Friday, KennyB -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Mike Fenner Sent: Friday, May 06, 2005 5:49 AM To: [log in to unmask] Subject: Re: [TN] Flux Cored Solder Shelf Life Yes the high lead alloys will blacken off over a few years, resurrect if you feel strongly enough by drawing the wire through a piece of folded paper a few times before use. Ordinary tin lead will be OK, at least the last one of my 1970s solder wire spools still works fine, [satisfyingly as I last used it for repairing the wiring loom on my 74 Triumph. Totally authentic period repair therefore] Regards Mike -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman Sent: Friday, May 06, 2005 1:29 PM To: [log in to unmask] Subject: Re: [TN] Flux Cored Solder Shelf Life Hi Gregg! Brian provided a great summary on the aging aspects of the flux core - I can provide some information on solder. There is a "default" shelf life for flux cored solder due to the oxidation of the solder alloy itself. All solder alloys oxidize over time so there will be a point where it would be prudent to no longer use an "old" flux cored solder roll. I have been "collecting" old flux core solder rolls from various areas of our manufacturing operations as "spring cleaning", part number revision, and facility re-layout activities happen. Its has been a good way to keep various odd solder alloy, flux combinations, and wire diameter variants on hand. We just put one of those older rolls into the recycle bin - I had an old Alpha Metals 10Sn/88Pb/2Ag solder roll with a "energized rosin" core from the 70's that finally accumulated a thick enough oxidized skin that inhibited soldering. I believe most of us would consider 30+ years of use as indefinite shelf life! Dave Hillman Rockwell Collins [log in to unmask] "Gregg A. Owens" <owensmttc@EARTHL INK.NET> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 05/05/2005 02:30 [TN] Flux Cored Solder Shelf Life PM Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to "Gregg A. Owens" <owensmttc@EARTHL INK.NET> TechNetters: A student of mine has asked, what is the shelf life of flux cored solder? In reviewing J-STD-001 and J-STD-004 I can't find any specific guidance or requirements from the Standards. I know newer rolls of solder (depending upon the manufacturer) have date codes and expiration dates. However, they have a wire solder spool still being used today that was entered into their HazMat system in 1998 (no actual record of the precise date of manufacture). The wire spool is removed from their HazMat system when needed to uncontrolled/undocumented working environments within their facility. Since the standards don't specify a shelf life, what is considered best industry practices or is there a Standard dealing with this issue? Thanks for your responses. Gregg A. Owens Master IPC Trainer Executive Director Manufacturing Technology Training Center, Inc. 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