A-2 tool steel baldes
This past week I have been making some new A-2 blades for my #11 and #9 Miller Falls planes. The stock I had was 3/16″. Heat-treat at 1775 and tempering at 400 came out at about a 61 rockwell. I ground the decarb off on my 12″ disk sander and a lot stoning.
The 3/16″ A-2 blades cut like the wood is butter
My #14 and #10 are next.
Those blades look great....nice skill to have! I love my MF 8, 11, and 14. Maybe I'll hire you someday to make a custom blade for one of them! ;)
Here's a table that may be of interest both to you and others.
Would you be able to give a supplier address for the A2 steel stock- the main suppliers here say they can't get flat bar stock in the widths one would require for plane blades....?
How did you get that heat , measure the temp and do you have access to a hardness tester?
Wacking off that decarb is an easy quick job with a belt grinder if you have one or would want to make one.
I get tool steel from Pacific Machinery and Tool Steel Co. 3445 N.W. Luzon. Portland, OR. 97210 Phone: 503-226-7656. See if you can get them to send you a copy the Stock List and Reference Book. It's full of good steel stuff. He is now selling on E-Bay too.
I have a big electric heat-treating furnace. It's digital electronic controlled.
Hardness testing, no rockwell tester, I use a file for hardness as files are 62.5 Rockwell.
And yes your big belt grinder is very nice. Just keep it under 300 or say good-by to the heat-treat.
I have some old book on steel, heat-treating, decarb you may like. I will sent you some copies.
Thanks John, I would appreciate the old books very much.
The fact about file hardness is a useful reference which I was not aware of.Philip Marcou
I sent off some info for you, hope it gets to you. Fix your address on your web page, no zip code.
If you have any trouble getting the sizes of A2 you want/need, send me an email listing the same. I have sources out here in PA that I buy steel from that can get anything you would want.
Thanks Tony, much appreciated.Philip Marcou
"...I have sources out here in PA that I buy steel from that can get anything you would want."
Really? How about O-1 or W-1 in fully spherodized bar stock that isn't "precision" ground? Steel supplier's idea of precision is pretty coarse, pretty irregular and causes a lot of unnecessary extra work. Larger sheet stock is a problem, not only because I don't have a way to handle or cut it, because the grit between the sheets causes some pretty deep gouges when it's moved.
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