Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net TSRA, Life; NRA LOH & Endowment Member, Golden Eagle, Patriot"s Medal. NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member.
Hot work tools- I need basically all of them. The S7 is on Pete's advice. I figure a bar of 1.5" x 36" round will make me a number of useful hardie tools (I have a small anvil, so there's no need for larger than that, I figure), and a thinner bar will work well for a handful of punches and chisels. The larger diameter will be for a bick, a hot cut, a bottom fuller, and some various other useful shapes for hammering things on.
I did note that there is a tool steel other than S7 that is specifically for hot work, but the literature I looked at indicated that S7 works like mild steel, which sounds good to me after discovering how much work it is to forge 1095.
I got a quote from Cincinnati tool steel that was very reasonable for the stuff today. Finding as S7 isn't a problem, it's just been bothering me that I thought I was familiar with the stuff under a different name, and I can't remember what it was. Whatever it was called, it was from Jorgenson steel. Nearest I can remember, it may have been just a similar alloy that was named for it's component metals like Chro-Moly followed by a numerical code.
Doesn't really matter, it just keeps popping into my head like a bad tune.
I use it too, for chisels and drifts. One word of caution though, if the metal gets too hot it will harden and become quite brittle. I had 1 inch drift blow up on me under a 16lb sledge. The top section shot off and banged around the shop for while and came to rest under a striker team working at the next forging station. Cool but kind of scary.
I havent had luck annealing it either so cutting after it has been forged can be a bit of a pain if accidental hardening happens. Any advice on "real" (blacksmith heat treating not heat treaters heat treating) heat treating of S-7 would be very much appreciated.
This isn't a direct answer to your question, but a few years ago I "tested" my ash bucket because I kept hearing about putting your part to be annealed in there to soften. Ashes ain't the answer for anything but the simplest carbon steel in my opinion.
'sAshBucketAnneal.gif The best idea I've ever heard for annealing something like S7 was to "build a big fire in the "Round Oak Heater", throw in your parts, fill the stove with wood and shut off the draft. Never tried it, but sounds plausible.
Andrew Mol> I use it too, for chisels and drifts. One word of caution though, if the