Tool Steel 2

[umreng]

I am looking for a good publication or two on application engineering of tool steels. Specifically, shock and wear resistant tool steels like AISI S-7. My interests are in specifications for heat treatment and practical hardness ranges of shear knives for cold shearing of steel plate.

 

[unclesyd]

Checkout the following:

http://www.asminternational.org

http://www.techstreet.com

There are quite a few books out there on tool steels and their uses. This is information that used to be given out by the steel producers for free.

 

[Maui]

Umreng,the following links will provide you with a condensed version of the heat treating information and mechanical properties data you are looking for:

http://www.crucibleservice.com/datash/dsS7v6.pdf

http://www.crucibleservice.com/datash/dsS7XLv2.pdf

Maui

 

[umreng]

Thanks for the help, maui and unclesyd. This is exactly what I needed (and more)!

 

[TVP]

There are a number of producers of S7 tool steel. Other producers that offer technical information on their websites include Timken Latrobe, Bohler Uddeholm, and Carpetner:

http://www.timken.com/products/specialtysteel/engineering/tech_info/PDF_Files/bearcat.pdf

http://www.bucorp.com/coldworksteels/default.asp?path=coldworksteels

http://www.cartech.com

click on Technical Information then Alloy Name then type S7

 

[met1]

ASM has some very good publications: Heat Treaters Guide, Steel Heat Treating and the hand books. Contact ASM for more info.

 

[fritzcoinc]

I was in the forging industry for some time and we cold sheared round and square alloy steel bars daily. A good material for this application is made by Finkle. It's name is Shell die.
Heat treat with double temper to 48 to 52 HRC and freeze to below -125 D.F. between the tempers. Use a tempering temprature beyond the secondary hardening hump in the hardness vs tempering curve. In other words use the highest possible tempering temprature. Shell Die is a modified H-13 that Finkle makes for the forging industry. H-13 can be used but is not as durable.
Good luck

 

[umreng]

Thanks for the information, fritzcoinc. What temperature is your sheared material? You are using a hot work ("H" Type) material that is commonly used for hot shearing (~1300-1700 degrees F.) steel bars and plate. My only experience in cold shearing has been an S-7 (Shock Load type)or similar proprietary grades for cold shearing (below 1000 degrees F.)

 

[fritzcoinc]

We were cold shearing carbon and alloy rounds up to 3 3/4" and squares up to 4" at room temp. to 300 D.F. Although Shelldie or H-13 are hot work tool steels they worked very well in our application. The blades were pre-heated before use.
We did use the S series tool steels for cold coining of carbon steel logo plates.

 

[CoryPad]

FYI, the company to which fritzcoinc referred is A. Finkl & Sons Company. Their Internet site is:

http://www.finkl.com

ShellDie[sup]®[/sup] is a modified H-11 steel.

Regards,

Cory

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