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Posted

It's likely spring steel, should make a fine drifts or some PH tools. Cut off a small piece and try hardening it, first air, then oil, then water.........

Posted

I would think that 4140 is the most likely but I have nothing more specific than that it is an alloy that is very common in the auto industry and would seem appropriate for such parts.

  • 2 weeks later...
Posted

I believe a lot of folks make their drifts out of mild steel. While I haven't I'd have to say as long as it's very smooth, you shouldn't be waisting your time. I have a hard time being certain of spark test, though it usually gives me an idea. Like Macbruce suggested I'd cut off a wafer heat it up to non magnetic and toss it in a bucket of cool water. Forget it for a few, and when you check on it, it'll be either intact, cracked or in a few pieces. That should tell you where to go from there. Just my two cents, I'm probably lazier than Macbruce :P

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