O1 or A2? Depends on your heat treat setup.
O1: oil-hardening, forgiving, and a favorite for first knives. A2: air-hardening, more stable through heat treat, and built for punches, dies, and fixtures that need to hold size.
Tool steel cut to length in Marietta, no minimum. Link in bio.
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Authentic close-up of tool steel bar stock on the racks at the Marietta location, or a customer's finished knife blank, punch, or die made from O1 or A2. Clean bar ends with grade markings visible work well. Real photos strongly preferred over stock. No Google Drive image folder is set up for this client yet, so request a real photo from the Marietta location.
Canva text suggestion: "O1 or A2? It Depends on Your Heat Treat" or "Oil-Hardening vs. Air-Hardening Tool Steel"