Hand Tools

Subject:
Yes - the confusion without XHP
Response To:
Another table from SB ()

david weaver
is that many of the charts show A2 and more alloyed, or that and less with a few PMs or D2.

This is one of the few that shows XHP with a whole bunch of things that we've heard of before.

If we see a chart of O1, A2 and a whole bunch of other things up to V9 or T15 or whatever the most highly alloyed stuff is (that doesn't reach the hardness we want in tools), they we don't have a reference for XHP.

I think bill said the other day that he wouldn't mind having chisels made of PD1, and I'd never heard of it. I see from the chart why he'd like to.

My preliminary response to the original question about relying on these charts is, yes, they probably have some valuable information, but first confirmation needs to be made that they have woodworking or edge tools in mind and not square edged dies.

Also, hardness is important information in these. CPM154 looks a lot like XHP in these charts, but it does so at lower hardness than we have in XHP. Once you put the demand for 62 hardness on these irons to limit issues with deflection, etc, then XHP separates itself from 154 by a mile.

Most of the super high toughness steels have constraints on hardness, and the charts show them at a different hardness than we use, and then some of the super wear resistant steels are extremely high in vanadium and may also have low hardness, or low toughness.

204P looks like an interesting thing to try from these charts, but it needs to get to 2100-2200 degrees F before being quenched, and I'm out. I can just barely get the heat needed for XHP.

Someone with a taste for commercial heat treating could use it no problem, but base stock plus time or cost to mill irons plus heat treatment plus grinding afterwards would probably yield some $75-$100 irons that may or may not match the chart.

I'm pretty thankful for the XHP at this point and am ready to just use it.

Messages In This Thread

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Re: The whole translation/review—for the obsesse
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Re: you underestimate the interest
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Another table from SB
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