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  1. 23rd July 2005, 09:14 PM #16
    Arron
    Arron is offline GOLD MEMBER
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    I went to Bohler and bought some of their top quality tool steel. It is offcuts -but man that stuff is expensive.

    I have had no success working it as it is just too hard for the equipment that I have available to me. This is odd, considering that the guy who sold it insisted it was annealed. I lost interest after trying to cut or grind it a few times.

    My interest has recently been rekindled - as I have bought a MAPP torch which would be very good for annealing and hardening in a home-made mini-furnace. I'll post again if I have success making it workable and then hardening it.

    I also went to McJings and bought some of their HSS steel. The size range is limited and oriented towards making smaller turning tools, so I just bought enough for a couple of blades.

    Arron
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  3. 23rd July 2005, 10:07 PM #17
    Theva
    Theva is offline Senior Member
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    Thanks Arron,

    Well, I got a bit further than that. Bought some S600 steel from the same mob (their version of AISI M2 or the closest) & got it machined at the local machinist.

    It is still in annealed state - Rc around 25 to 30 but a real PITB :eek: to grind, even before hardening.

    Planning to check hardening options with Skippers next week.

    DIY hardening with MAPP gas or oxy may be tricky because the temperature requirements are high and tolerances very tight.

    Cheers,
    Theva
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  4. 21st September 2009, 10:04 AM #18
    Retromilling
    Retromilling is offline Senior Member
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    Quote Originally Posted by Tankstand View Post
    Hi all,
    (0-1 or something similar would be preferred.)
    I have been using Bohler steel K245 other wise known as S101A
    I think this is the same grade that people refer to as "01"
    Readily available from any large steel merchant, in any form, some will sell by the Metre.
    Bohlers O1 grade is " Arnie " however K245 is a good steel also . I think the main difference to us would be that O1 is easier to heat treat at home and K245 to get the best heat treat needs longer holding at hardening temps.
    Also dimentional stability of K245 after heat treatment might be better than O1 , might be depending on how good the heat treatment is I guess.
    For high dimentional stability after heat treatment you use K110 which is a D2 grade steel.
    The volume of a pizza of thickness 'a' and radius 'z' is given by pi z z a.
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