Aiden CC Posted December 2, 2021 Share Posted December 2, 2021 I recently decided to try out this steel, sometimes referred to as "silver steel," for some puukkos and I've had some problems with cracking. There isn't too much info (at least that I can find) about heat treating it, so I figured I would see if anyone has used it or has any insights. Here is the process based on what I have been able to find and my results so far: -Forge to shape -Normalize once "by eye" in the forge, air cool (well, technically in sand but just the tip to hold the blade upright) -Grind to 60 grit (maybe this is too coarse? These knives are zero ground so I go back to 60 after ht anyways so it feels like a waste to go higher if it isn't necessary) -5 Minutes at 1475 F, air cool -5 Minutes at 1425 F, air cool -Austenize 10 minutes at 1475 F -Interrupted quench with water and canola oil (6 blades, 1 cracked 1 warped and cracked in straightening during second temper, all had some "sori") -Canola oil quench (1 blade, cracked but didn't open due to less distortion and only showed up during grinding) -Temper 375 F twice for two hours For reference, here's the steel's composition: C: Mn: Si: P: S: Cr: Ni: V: Mo: W: 1.10 - 1.25 0.20 - 0.40 0.15 - 0.30 <0.03 <0.03 0.5 - 0.8 - 0.07 - 0.12 - - I ordered some Parks 50 to try, which may help as well. Thanks for looking and any insights/suggestions are appreciated! Link to comment Share on other sites More sharing options...
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