Chinese GB 9Cr18MoV and AISI 440C are the most-quoted martensitic stainless steels for industrial blades that need corrosion resistance. They are not identical — the Mo and V content make 9Cr18MoV the tougher of the two. Here is the engineering comparison.
AISI D2 and JIS SKD11 are the most-quoted cold-work tool steels in industrial blade manufacturing. They share a spec sheet — but the heat treatment, dimensional consistency and field performance are not identical. Here is the engineering comparison.
A side-by-side comparison of high-speed steel and tungsten carbide for industrial machine knives — covering hardness, toughness, cost, edge retention and the substrates each material was actually designed to cut.
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.
YG6X and YG8 are the two most-specified Chinese GB standard tungsten carbide grades for industrial knives. The 2 % cobalt difference looks small but it changes the wear-toughness trade, the impact resistance, and the substrate fit. Here is the engineering comparison.