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  • Choice of steel

    All:

    I have a 1.5"x6" hunk of 4140 HT which seems to machine like mild steel (disappointed) . I'm re-building a vise lead screw and I require a reasonably hard material. Would I be better off using a water hardening or oil hardening (annealed) tool steel instead? I don't have facilities for heat treatment and I'm really short of funds so sending parts out for heat treatment is not an option.

  • #2
    303 Stainless is good for shafts, easy to machine. "Relatively" hard without any heat-treating, and has anti-galling features.

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    • #3
      It DOES machine well. But you may notice that it wears out HSS pretty rapidly.

      It will likely work OK for your screw. And wear less than annealed un-treated O-1 or W1.

      1144 is another material that machines super and yet does not wear that fast.
      1601

      Keep eye on ball.
      Hashim Khan

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      • #4
        Yep 1144, I use stress proof for pretty much anything I don't need to weld. It can be hardened too.

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        • #5
          The 4140 HT is a good choice for that application. It machines well, but is pretty tough.
          Kansas City area

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          • #6
            Are you sure it's HT or "annealed". Annealed will machine very much like gummy 1018/A36.

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            • #7
              Another vote for 1144 Stressproof.
              It is around Rc32 if I recall.
              Turns, mills, and drills and taps well.

              -Doozer
              DZER

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              • #8
                Originally posted by Doozer View Post
                Another vote for 1144 Stressproof.
                It is around Rc32 if I recall.
                Turns, mills, and drills and taps well.

                -Doozer
                speedymetals says 24-26Rc depending on the diameter. I never tried it but will have to some time, its often recommended.
                http://www.speedymetals.com/information/material36.html

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