Warning: my old shop teacher in Dayton said to quench 5160 in warm oil, but the guy who runs the forge down the street swears by parks 50 at 120 degrees

Sean Harris · 2026-10-14T13:00:10.548403+00:00

Now I have two buckets, two opinions, and no idea which one to trust, so who is actually right about oil temp for 5160?

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Warning: my old shop teacher in Dayton said to quench 5160 in warm oil, but the guy who runs the forge down the street swears by parks 50 at 120 degrees | Blacksmiths - Vivisector