What steel

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What steel

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  • #786208
    Peter Simpson 3
    Participant
      @petersimpson3

      I would like to make some small pawls. The dimensions will be approx. 3/16″ wide x 1″ long and 1/2″ deep. I want to harden them once finished. Which steel would be the most suitable ?

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      #786212
      JasonB
      Moderator
        @jasonb

        To through harden then Gauge plate (Ground flat stock) or you could mill the rectangular section from larger diameter silver steel.

        If you just want the surface hard then mild steel such as EN3 flat bar will do for case hardening.

        #786217
        Fulmen
        Participant
          @fulmen

          If you just need something that is generally hard and strong then any heat treatable steel will do. O1, spring steel, silver steel, chrome moly, whatever you can get your hands on. Even 8.8 ( and possibly 5/6.6) grade machine bolts will harden enough for undemanding work, but probably not for punches and cutting tools.

          For thin, flat stock check out the knife smiths.

          If you have a furnace then case hardening can be an option, although thin/complex parts are prone to warping and cracking.

           

          #786224
          bernard towers
          Participant
            @bernardtowers37738

            why. not make them of EN8 its easily hardened

            #786225
            Fulmen
            Participant
              @fulmen

              As I said, anything that can be hardened. I don’t know too much about UK steels so I’ll leave the details as an exercise for the OP. For a more specific answer the OP should describe it’s use and what loads it will be subjected to.

              Very roughly speaking there are two main classes of steels to consider; engineering steels and tool steels.

              Engineering steels are though. Tensile strength is in the 500-1000MPa (70-150ksi) range and will bend before breaking. I believe the EN-series is in this category.
              Tool steels are hard. Tensile strength from 1000 to 15000+MPa (150-220ksi). Tends to break before bending. This is stuff like O1, drill rod and silver steel.

              #786243
              Hollowpoint
              Participant
                @hollowpoint

                I’d use O1 for your purpose.

                #786312
                Diogenes
                Participant
                  @diogenes

                  ..which commonly comes in a multiplicity of useful ‘standard’ sections.. ..i.e.. other suppliers are available

                  https://www.ebay.co.uk/itm/145389515956?msockid=3c3ed05d6f1e6e610f52c3ca6e266fe7

                   

                  #786329
                  bernard towers
                  Participant
                    @bernardtowers37738

                    Diogenes, your link is US

                    #786340
                    JasonB
                    Moderator
                      @jasonb

                      You can buy it from M-machine in the same size and support our advertisers at the same time. Or go to Cromwell in the UK who are all part of Zoro or the other way round.

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