Author: David Hillman Company: Rockwell Collins Date Published: 5/17/2010
ICSR (Soldering and Reliability)
Abstract: The use of cored wire solder for manual soldering operations is a basic tenet of the electronic industry soldering practices. The shelf life characteristic of any soldering process consumable is a key material attribute. The typical shelf life recommendation issued by a cored wired solder manufacturer is two years maximum. It is a rare event for most soldering operations to not consume a cored wire solder spool before reaching the two year shelf life recommendation. However, changes in production volumes, reduced product cycle times or variations in spare product production schedules can result in situations where a spool of cored wire solder is not consumed and exceeds the two year shelf life recommendation.
This paper documents an investigation demonstrating that a two year shelf life recommendation is unnecessarily conservative.
Keywords: Cored wire solder, shelf life characteristics