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Heat treat info

Heat treat info

Heat treat info

(OP)
Short of bringing in all my old books or the ASM heat treat volume, I'm looking for some good online heat treat information for a variety of alloys.

I should mention that while I'm a bioengineer I recently took a job in metallurgy (my undergraduate degree) after about 5 years in a different field altogether. So I'm trying to recall alot of things as I need them for failure analysis and other things I'm doing at work.

Any suggestions?

RE: Heat treat info

First, I strongly recommend that you become a member of ASM if you aren't already.  Their reference materials are the best on the subject.  Their monthly publication Heat Treating Progress is a good source of current information, technical articles, etc.  Also, as a member, you have free on-line access to Metals Handbook Desk Edition, 2nd Edition which has a great deal of information on heat treating, failure analysis, etc.  The reduced prices available to members makes it very worthwhile when you need to purchase anything, like ASM HANDBOOK Volume 4 Heat Treating, Heat Treater's Guide: Practices and Procedures for Irons and Steels, 2nd Edition, or any of the other references available using the following link:

http://www.asminternational.org/Template.cfm?Section=BrowsebyTopic&template=Ecommerce/Topic.cfm&TopicID=11

Ok, now that I am off my soapbox, the following websites are good sources of information on heat treating:

Several references on heat treating, tool steels, etc.
http://www.timken.com/products/specialtysteel/engineering/tech_info/techtips.asp

MIL-H-6875H
http://assist2.daps.dla.mil/eAccess/index.cfm?ident_number=6191

MIL-H-6088G
http://assist2.daps.dla.mil/eAccess/index.cfm?ident_number=5791

other MIL specs
http://assist2.daps.dla.mil/quicksearch/quicksearch_query.cfm

MTI
http://www.metaltreat.com/

CHTE
http://www.wpi.edu/Academics/Research/CHTE/

RE: Heat treat info

(OP)
Thanks TVP I really appreciate it.

I am actually a member of ASM's local committee still but let my member dues lapse (don't tell anyone!). I will renew my membership.

RE: Heat treat info

What's the temperature range for forging 440A stainless steel? How to avoid the crack during hot forming?

RE: Heat treat info

The following information is from the Carpenter Stainless Steels book, which can be obtained from Carpenter using their website (http://www.cartech.com):
 
Hot Working
This steel should be handled like high-speed tool steel. Preheat to 1400/1500ºF (760/816ºC), then heat slowly and uniformly to 1900/2200ºF (1038/1204ºC). Do not forge below 1700ºF (927ºC), and reheat as often as necessary. Cool in a furnace if possible or in warm dry lime or ashes. Anneal after forging; cool to room temperature before annealing.

Allegheny Ludlum is another producer of stainless steel alloy 440A, and their recommendations can be found using the following link:

http://www.alleghenyludlum.com/pages/products/PDF/mart400.pdf

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