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Carbide grain size can be measured and documented with a scanning electron micrscope. I do not have one of these in my shop but the metallurgists whose phone no.s I keep handy do.
One of the finest grain tool steels available (not stainless) is called 52100 and is made by Timken-Latrobe here in the USA. This is a bearing and bearing race steel and be gotten very hard by heat treat. This steel has gained favor among many bladesmiths.
Anyone care to guess how a steel testing softer on the Rockwell hardness scale can out perform the 52100 in edge holding type cutting tests?
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