Speeds and feeds Wikipedia
Cutting speeds for various materials using a plain high speed steel cutter; Material type Meters per min (MPM) Surface feet per min (SFM) Steel (tough) 1850: 60100 Mild Steel: 338: 10125 Mild Steel (with coolant) 67 2025 Cast Iron (medium) 12: 68 Alloy Steels () 320: 1265: Carbon Steels (C1008C1095) 451: 070