GOST R6M5K5-MP Knife Steel
Composition Analysis Graph, Equivalents And Overview

R6M5K5-MP(GOST) - High speed tool sHigh speed tool steel. A bit an odd one in terms of specs. There is a non PM version of the same alloy, at least the name is the same without MP postfix, indicating non PM steel: R6M5K5 high speed tool steel. As one would think just a change in technology wouldn't warrant composition spec change, but in this case it does. R6M5K5-MP has slightly difference composition, including higher Carbon, Vanadium, Tungsten and Cobalt and content. Still, the difference is not too significant, and R6M5K5-MP could be included in AISI M35 high speed steel group, although it is rather unusual to have PM technology be a part of a standard spec, hence the separate group. Generally speaking R6M5K5-MP is a modification of the AISI M2 High Speed Tool Steel with extra 5% of Cobalt in it. That mainly helps with red hot hardness, but also improves attainable hardness as well. Overall, should do better in knives than M2, but so far I can't fine a knife made out of R6M5K5-MP, even though it is discussed on Russian knife forums and has positive feedback.teel.

Manufacturing Technology - PM

Country - Russia(RU)

Known Aliases:
GOST - DI101-MP