... making all kinds of planner knife, 2.Flat, bars,round High speed steel(W18,W9,W6,W5,W2)Planer knife1. ... kinds of knife, also for cold work moulds with high precision, long service life requirements, such as punching die ... black surface or millingAnnealed, hardness , HB2553.GeneralThorough hardenability, high tough resistance, high oxidation resistance 4.DeliveryMill deliver condition,without sawing or ...