420J2 is a martensitic stainless steel with higher carbon content than 420J1, offering improved hardness and wear resistance after heat treatment. It is widely used for cutlery and industrial blades.
Key Properties
Hardness: Can achieve HRC 50+ after quenching and tempering.
Wear Resistance: Excellent resistance to abrasion and edge retention.
Corrosion: Moderate resistance to mild atmospheres and fresh water.
Machinability: Good in annealed condition; requires care after hardening.
Common Applications
Cutlery: High-quality knives, scissors, and razor blades.
Industrial Blades: Slitter knives, guillotine blades, and shear blades.
Valves: Valve seats and trim requiring wear resistance.
Pumps: Impellers and shafts for abrasive media.