Carbide Micrograin Carbide End Mills List 497 Profiling (Fractional) Hardness – Up to 20 HRC 20 to 30 HRC 30 to 40 HRC 40 to 50 HRC WorkMaterial Cast Iron Mild Carbon SteelsMild SteelsPre-hardened Steels Pre-hardened SteelsStainless SteelStainless SteelDie & Alloy SteelsDie & Alloy SteelsHardened Steels CuttingSpeed 390 SFM 390 SFM 330 SFM 260 SFM 200 SFM Depthof Cut ar=0.3D aa D<5/80.05D5/8