15n20 8.5"x11" sampler

JTknives

JTknives

Blade Heat Treating www.jarodtodd.com
Knifemaker / Craftsman / Service Provider
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We have had a lot of requests for smaller quantities of 15n20; So we added this to our line up. Like all our other steel its reclaimed Uddeholm 15n20. Envelope contains 5 sheets that are .090 thick and measure approximately 8.5" x 11". We settled on this size so you can use a sheet of paper to sketch out your ideas and know it will fit on this sheet. Price is $50 shipped in the USA.
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15n20envelope2.jpeg


15n20envelope.jpeg
 
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Can you do this with .102” ? .110”?

Is it annealed?
 
I can answer that question, no it is not. I just received some and my band saw just dances on the edge. I wish I had asked this question before ordering.

Edit, I have the steel in my kiln right now, I'm going to run it up to 1500 f, soak for about 15 minutes then then the kiln off and check it tomorrow. I have steel spacers (3/16") between the sheets to allow easier heat transfer. I had to do this once with some 15n20 that I got from another supplier.

As long as it can be annealed this is not a big deal, just an extra step.
 
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It is reclaimed steel steel so it’s around 42-43RC. In fact most new 15n20 comes pre hardened. To soften I would not take it up to 1500°. 15n20 will air harden so heat it to a temp that is under the austenite temp. I normally heat it to around 900-1000°. Just stay under 1400° and you should be fine.
 
JT, by the time you posted your message I already had it at temperature. The results are that it is now annealed and cuts easily with my band saw. The negative is that it warped and cupped badly. I cut a couple of 1 1/2" x 11" strips and tried to straighten them by hand. I can get one edge or the other straight but not both due to the cupping. Maybe I can use this for smaller projects. Or I can use it to practice welding. I'm glad this was a small amount of steel.
 
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Usually this is easily correctable during the heat treat. If any of my blades warp or bow I heat to austonite temp and clamp them straight between two thick strips of steel or aluminum. Then after its cool i reheat to temp and quench. If it try's to warp again out of the quench I clamp it between the steel plates and let cool. After its cooled down it should come out of the plates straight or very close. I then temper in the oven with it clamped to a steel plate. Make sure its clamped straight with no gaps between the plate and blade. Usually requires 3 c-clamps to get even pressure. do not temper it before clamping the blade straight. Then temper it around 350 and she should come out laser straight.

I'm sorry your having difficulty with this steel. If the advise above does not help let me know and I will send you a replacement. JT
 
JT, I'm not blaming you for the warping, I should have checked with you before I annealed the steel. I've made quite a few blades front 15n20 and the last time I bought it I certainly asked if it was annealed because I had bought it previously in a semi hardened state from another supplier and it tore up a band saw blade in no time. I just had a brain fart and didn't think to ask if this steel was annealed. I'm a little ticked but it's not your fault. Your offer shows you are a stand up guy and I thank you but I'm good, I'll find some use for the steel, just not what I had originally planned.
 
I'm thinking about ordering a sampler. I read in another thread about cutting with the grain vs across the grain with regards to warping This was a thread on AEB-L.

For these sampler sheets, how should a blade be placed? With the edge parallel with the 11" side or with it horizontal parallel with the 8.5" side.
 
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