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Oil or water hardening steel telling the difference

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  • Oil or water hardening steel telling the difference

    In a discussion about converting the old star concrete drills/punches or chisels. Into stamps for jewelry work repousse/chasing ect. Is there awy to tell the Oil hardening from the Water hardening steel. And Also since the use of the stamps will be limited in the number of strikes at one time. If you rehardened the steel with the wrong liquid how much difference would it make. Or could you just use Kase-it or some other hardening powder.
    Glen
    Been there, probably broke it, doing that!
    I am not a lawyer, and never played one on TV!
    All the usual and standard disclaimers apply. Do not try this at home, use only as directed, No warranties express or implied, for the intended use or the suggested uses, Wear safety glasses, closed course, professionals only

  • #2
    I don't know how to tell the difference, but either can be hardened in oil with good results.
    Jim H.

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    • #3
      thanks JC Thats what I thought I remembered from a long time ago if you don't know use oil not water.
      Glen
      Been there, probably broke it, doing that!
      I am not a lawyer, and never played one on TV!
      All the usual and standard disclaimers apply. Do not try this at home, use only as directed, No warranties express or implied, for the intended use or the suggested uses, Wear safety glasses, closed course, professionals only

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      • #4
        The difference is that water hardening NEEDS the quicker heat removal for full hardening, so quenching in oil will not harden water hardening steel to as high a hardness.

        The oil-hardening has generally less tendency to crack at "stress-risers" like corners etc. Naturally a less aggressive quench has something to do with that also.
        1601

        Keep eye on ball.
        Hashim Khan

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        • #5
          Originally posted by PTSideshow
          Or could you just use Kase-it or some other hardening powder.
          That just adds carbon to steel which otherwise doesn't have enough carbon to be hardenable. Since carbon can only be added by diffusion (unless you have an ion implanter lying around), only a thin outer layer is hardenable - the "case" in case-hardening.

          Both oil-hardening and water-hardening steels have plenty of carbon already. Adding more will cause odd things to happen.

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