XB5 (Russian naming system, written in latin would be HW5) is Russian alloyed tool steel with no direct analogue in the West. Nicknamed almazka (almaz is the Russian for diamond), was used for manufacturing diamond cutting equipment. Excellent hardness, very good edge retention make it preferable choice for hunting knives, but not survival knives – XB5 lacks toughness necessary for chopping. The dotlike pattern visible on the blade is characteristic for almazka. XB5 is not resistant to corrosion.

XB5 steel

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