Steve,

ASM International, a materials-oriented professional society, is the best source of this type of data.  I would recommend you investigate the following publications that they offer:

ASM HANDBOOK Volume 19: Fatigue and Fracture

Atlas of Fatigue Curves

Properties of Aluminum Alloys: Tensile, Creep, and Fatigue Data at High and Low Temperatures

Fatigue Data Book: Light Structural Alloys

You can find out more (pricing, availability, etc.) at their website: www.asminternational.com

A good source of fatigue data is the U.S. Government, specifically the military.  MIL-HDBK-5H, Metallic Materials and Elements for Aerospace Vehicle Structures, has a lot of fatigue data.  It is available for free at the following website:

http://astimage.daps.dla.mil/quicksearch/

Note: this is an absolutely HUGE file (> 42 MB), so it takes forever to download.  You should only attempt this if you have a T1 line or a cable modem, and a very robust connection.

Another military publication is the Aerospace Structural Metals Handbook, which is published by the U.S. Air Force.

Some or all of these publications would be available at a major university library, so I would recommend a trip if you don't want to pay a lot for this info.  I doubt you will find much fatigue data on any of the internet.  Best of luck to you.

TVP, the download problem you mention above for MIL-HDBK-5H is resolved if you use http://euler9.tripod.com/ and select "MIL-HDBK-5H."  (The pop-ups are killed if you turn off javascript, called "Scripting" in IE, in your browser options.)  You can pick any subsections you need at the above link and save a huge amount of wasted time.

f61,

Thanks for the info.  Since I already have the document this doesn't help me, but I'm sure it will be of benefit to Steve and others.

http://www.grantadesign.com/news/battelle.htm

MIL-HDBK-5 is also available at this site, broken down by chapter, reducing download time.

Doug