View Full Version : "Key steel", should I harden it?

The Artful Bodger
04-13-2012, 04:12 PM
I can buy 'key steel' in convenient sizes and I am wondering if this
is suitable for making these tool holders..


It is bright drawn steel bars (and I dont have to leave town to buy it)
the composition is:

C Mn C Mn
0.45% 0.6-1.0% 0.42/0.5% max 0.50-0.80%

It is of course easy to machine and I assume the carbon content means it can be hardened somewhat.

The question is, should I harden it or use it as is?

04-13-2012, 04:41 PM
Any steel makes a good toolholder, its all got the same overall rigidity.

Soft steels might bend in a tool crash and the insert/tool pocket might wear a little, but otherwise they are fine.

04-13-2012, 06:46 PM
I have used thid for tool holders and whatnot...I usually harden it the same as lc steell.Kasenite works the best...cheers

04-13-2012, 08:15 PM
I wouldnt bother as your usage wouldnt warrant it , unless you are going to use a particular holder a lot or heavily cut for long periods .
I have made a couple lately and unless I stuff up and push the cutter into the chuck they dont show any signs of wear yet and they are about three years old now.