Group: I have a some questions regarding T/E I'm hoping someone can help. 1. IPC-TM-650 2.4.18.1A paragraph 5.3.4.2 requires a Cross head speed of between .05 - .5mm/mm (.00197-.0197 in/in) but does not specify the speed to use in the test. It seems to me that the cross head speed could affect the elongation values. The slower the speed the higher the elongation. Is there any validity to my thought or does speed not make a difference? 2. Tensile strength and elongation have an inverse relationship. Higher elongation = lower tensile. Is this true? 3. Paragraph 5.2 requires a Pre Test bake. Why? Does this bake affect T/E? What if the board shop also baked the sample for 4 - 6 hours - Would a double bake have twice the affect. Thanks in advance for any help. pete --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------