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This thread gets a prize for going on forever, but the messages are certainly useful and interesting. Japanese engineers have many years of experience with stainless pipe in water supply service, including high- pressure and superheated service. You might find references in their literature...

unclesyd You are right; most specs give only Charpy and/or Izod, but an increasing number of manufacturers will provide fracture toughness data as K1C values if you ask for it. Clearly, however, fracture toughness is only ONE of the properties that must be considered in mold steel selection...

Hi unclesyd: Thanks for the suggestion. The interesting findings described in that paper are an extension of the well-known relationship between brittleness and crack propagation. We did some simple work on this some time ago to demonstrate that ductile fracture travels a few feet per second...

Hi tgreenwood: Would suggest you visit <www.nidi.org> the web site of the Nickel Development Institute. Their technical section contains all kinds of detail on your question, and you can get answers to psecific questions from their metallurgists.

Mikepare: You have had loads of excellent advice - even learned Shakespearian quotes - yet you may want to seek completely free expert guidance on both technical and cost aspects of your specific application by posting your question at www.nidi.org. That is the website of the Nickel...

Greg: This interesting thread seems to live on forever. Have the various suggestions helped you to solve the shaft problem, or develop a program designed to solve it? A quick update would likely be appreciated by all of us. Ted Gerson

Rafi: Would suggest you read the chapters on crack initiation and growth in &quot;Fracture & Fatigue Control in Structures&quot; by Barsom & Rolfe; published by Prentice & Hall. ISBN 0-13-329863-9 025.

Further to TVP's excellent post, you might note that copies of the ASM Metals Handbook are available in the reference section of most technical libraries, and in quite a few municipal libraries as well. The 10th edition is the latest (the first edition appeared in 1930), but an earlier one will...

Greg: Thank you for starting a discussion which has brought out all kinds of excellent input. I agree that it is important to determine the cause of the fatigue failure, but wonder how much time you have to study and investigate. For a FAST CURE of your problem, I would suggest you switch...

Please see my answer in the metallurgy forum

PUCP: The Jominy end-quench test determines the HARDENABILITY (not the hardness) of a given steel, and therefore is an indirect indicator of composition and hence quality. Would suggest you ask the supplier or mill from whom you bought the shaft material; they should be able to provide...

Would suggest you check out <www.nidi.org> the website of the Nickel Development Institute. Click on Technical Papers and follow prompts to welding stainless steel

ASM Metals Handbook, Ninth Edition, Volume 1 contains text and graphs on fatigue life and fatigue limit, beginning on page 21, with additional info beginning on page 43 and then on page 665. The handbook is available in most reference libraries.

Would suggest you visit www.nidi.org and look through the technical info you can download there. Among several items on welding of stainless steel, I recall # 10,014, #1208 and #9002. You may find others by using the search engine available on the NiDI site. Good luck.

Wil: Further to BLN's good suggestions, you might note: 1. The Handbook of ASM International provides a useful method of presenting mechanical and physical properties of materials. You could use similar headings as a template. The Handbook is available in most public reference libraries 2...

MEB: About five years ago, it was reported that the Europeans had unsuccessfully tried to recover ferrous material from filtration &quot;mud&quot;. High specific surface was the main difficulty - firstly in removing the organic (oily) coating on the particles - and secondly the explosion...

Irwin Look up Volume 2 of the 9th edition of &quot;Metals Handbook&quot; published by ASM International (formerly American Society for Metals). Most public libraries have a copy of this book in their reference section. You will note that some of the properties you ask for will vary with...

Would suggest you visit www.nidi.org and follow the prompts

MagnetMan &quot;Swedish Iron&quot; is a common name for high-purity wrought iron. It got its name many years ago because Swedish ores were very low in impurities. Any modern soft magnetic wrought iron will offer comparable properties.

Based on what you have told us, I like Andy's suggestion of a separate containment. Two further thoughts: 1. Since you need to be &quot;thin&quot;, I wonder whether total weight has to be kept to a minimum. If so, you might use a rotationally cast cylinder for your containment to increase...