M35: Through proper heat treatment, high hardness (HRC67～70), high red hardness (625℃4 hours, HRC63～65) and high wear resistance can be obtained, which is suitable for manufacturing various tools for strong cutting wear and impact resistance. , Die, screw die, toughness and complex shape tools, such as reamers, milling cutters, iron heads, punches, etc. are required. The main uses are complex tools such as hobs, broaches, end mills, etc., which are easy to perform hot and cold processing.