round gauge plate?

Is there a round equivalent for ground flat stock, ie a round oil-hardening steel?
Silver steel is water-hardening and doesn't get as hard or as strong as gp.
Any names to look out for/google?
TIA,
-- Peter F
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On 11/01/2014 6:43 AM, Peter Fairbrother wrote:

O1 silver steel is oil hardening , W1 is water hardening silver steel. Use 01 .
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West Yorks Steel lists round O1
Hth Dave
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