In the context of saltwater use, both LC200N and H-2 (the updated version of H-1) are considered "rust-proof" steels. They utilize nitrogen instead of carbon to eliminate the chemical pathway for traditional rusting.
Corrosion Resistance Comparison
H-2 Steel (Absolute Maximum): This is the ultimate "no-maintenance" steel. It is chemically impossible for H-2 to rust in saltwater environments. It is specifically designed for long-term submersion and is the gold standard for dive knives and emergency salt-water tools.
LC200N Steel (Functionally Immune): While technically a fraction below H-2 in extreme laboratory salt-spray tests, it is rust-proof for all practical human applications. It can be left wet with saltwater indefinitely without pitting or corroding.
Key Differences for Saltwater Use
Feature | LC200N | H-2 |
|---|---|---|
Corrosion Resistance | Near-Absolute | Absolute |
Edge Retention | Superior (Stays sharp longer) | Poor (Dulls quickly) |
Toughness | Very High | Extreme (Work-hardens) |
Best Edge Style | Plain Edge (Standard slicing) | Serrated (Essential for H-2) |
Sharpening Ease | Very Easy | Very Easy |
Application Recommendation
Choose LC200N for an Everyday Carry (EDC) or fishing knife where you still want a high-performance cutting edge. It holds a sharp edge significantly longer than H-2, making it a much better tool for slicing line, bait, or food.
Choose H-2 for a dedicated dive knife or rescue tool, especially in a serrated configuration. The process of grinding serrations into H-2 "work-hardens" the steel, making the serrated edge hold its sharpness much better than a plain H-2 edge.
Summary: If you need a knife that cuts well and won't rust, pick LC200N. If you need a knife that can be neglected in a dive bag for years and still be "unbreakable" when you need to saw through a rope, pick H-2.