440C Stainless Steel Machining: Hardness, Tooling, and Tight Tolerances

440C Stainless Steel Machining: Hardness, Tooling, and Tight Tolerances - Huaxiao precision manufacturing

440C is the go-to martensitic stainless when a part must be both hard and corrosion-resistant: bearings, cutters, valve seats, and surgical tools all lean on it. But that hardness is exactly what makes 440C stainless steel machining unforgiving. Get the tooling and sequence wrong and you will fight work hardening, poor surface finish, and rapid […]