Ken I must assume that you are talking about Pb95/Sn5 and Pb10/Sn10. Some conventions always place the tin first and other place the major element first. Different countries use different conventions. A good reference is J- Std- 006 which for Pb95/Sn5 gives the solidus temperature at 208'C and the liquidus temperature at 212'C, and for 90Pb/10Sn the liquidus temperature is 275'C and solidus temperature is 302'C. Phil Hinton ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################