Why 1.2510 is still a go-to tool steel for makers
If you've spent any time in a machine shop or a custom knife workshop, you've almost certainly run into 1.2510 at some point. It's one of those workhorse materials that people often call O1 tool steel, and honestly, it's a staple for a reason. While modern metallurgy keeps pumping out "super steels" that cost a fortune and require a PhD to heat treat, this specific grade stays popular because it's predictable, reliable, and does exactly what it says on the tin. ...