1062--Eight stars high-speed steel three-face milling cutter blade sharp steel milling steel milling cutter disk 63 80 100 125 white steel three-face edgeHigh speed steel three face milling cutter blade sharp steel milling steel milling cutter disk 1. New process forging 3 times tempering quenching temperature 1190 ~ 1290 2. Professional front and rear angle design increases cutting force by 50%+. 3 tempered hardness up to 64 66 degrees bending strength GPA: 3. 5 4. 0 impact toughness (MJM2): 0. 30 0. 40