HY-PRO® CARB Performance Sub-Micrograin Carbide End Mills List HP410 Slotting (Fractional) Hardness Up to 20 HRC 20 to 30 HRC 30 to 38 HRC 38 to 45 HRC 45 to 55 HRC 55 to 60 HRC WorkMaterial Mild SteelsCarbon Steels Alloy SteelsTool SteelsTi Alloys (Annealed)Hardened SteelsPre-hardenedSteelsTi Alloys (SolutionTreated and Aged)Hardened SteelsPre-hardenedSteelsStainless SteelsInconelNi Based AlloysHardened SteelsHardened Steels CuttingSpeed 262 SFM 213 SFM 180 SFM 164 SFM 98 SFM 49 SFM Depthof Cut aaD<1/160.05D 1/16