· KAIPU Engineering · material-comparison
M2 vs M4 HSS: Which High-Speed Steel for Your Industrial Blade?
AISI M2 is the workhorse high-speed steel of the converting industry. AISI M4 is its higher-vanadium cousin. The 1 % V difference looks small on a chemistry sheet but it changes how the knife cuts, how it grinds, and how long it lasts. Here is the engineering comparison.