Best CS-HD for Shirogami #1 steel (HRC 65)? Is 320 too coarse to start? Finish with 1200? Thanks
Boride CS-HD Stone [6" x 1"]
Question ID: 6571002 Status:
Open Dec 20, 2025 - 11:05 PM
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Answer
Dec 20, 2025 - 11:37 PM
CS-HD is generally recommended up to around 63HRC, but it is not as important as the quantity of hard carbides in the steel. Shirogami #1 is a relatively basic high carbon (note - not hard carbide) steel without excessively hard carbides so it will sharpen up well; even at very high HRC levels with these stones. 320 is not too coarse, and the finest grit you stop at will depend on what you want from the edge.
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Boride CS-HD Stone [6" x 1"]
Boride Sharpening Stones are used for sharpening knives on Hapstone Pro sharpeners. Boride offers a wide range of stones with different performance values and different rates of wear. Boride stones are made of aluminum oxide, with the exception of CS-HD series stones, which are made of silicon carbi...
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