Heat treat info 1

[EngineerDave]

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?

 

[TVP]

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/Tem...Topic&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/

 

[EngineerDave]

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.

 

[jin1]

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

 

[TVP]

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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