13Cr martensitic stainless steel (variant 18) is a chromium-bearing iron alloy with elevated carbon and molybdenum content, designed to achieve high strength through martensitic heat treatment while maintaining corrosion resistance. This material is used in demanding applications where both wear resistance and moderate corrosion protection are required, such as hydraulic components, fasteners, and cutlery—selected by engineers who need the hardness and strength of martensitic stainless without the brittleness of fully hardened tool steels. The molybdenum addition improves toughness and corrosion performance compared to standard 13% chromium grades, making it a practical choice for oil & gas valves, pumps, and other high-stress environments where aqueous or mildly corrosive exposure is expected.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 17.70 | - | — | ||
Ultimate Tensile Strength(σUTS) | 1.767 | GPa | — | ||
Yield Strength (0.2% offset)(σy) | 1.369 | GPa | — |