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02-10-2015, 02:56 PM #15Senior Member
- Join Date
- Feb 2010
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- Yorkshire, UK
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We use centigrade in England
The grain certainly looks finer in the last two pictures. I basically follow uddeholme's instructions for their O1 which can be seen here http://www.uddeholm.com/files/PB_Udd...ne_english.pdf .They recommend 650c for stress relieving and I notice you're going much hotter.
You are tempering much cooler than me but I don't think this will effect the grain, though I'm not 100% on that. What hardness are you trying to achieve? I have found when I temper up in the 61rc region the edge can be a bit chippy. I aim for 59rc with O1.
Other than that your process sounds fine to me.Last edited by mikew; 02-10-2015 at 03:00 PM.
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