13Cr martensitic stainless steel (variant 19) is a high-carbon, molybdenum-strengthened stainless alloy designed to achieve exceptional hardness and wear resistance through heat treatment and martensitic transformation. This material is used in demanding applications where corrosion resistance must be combined with extreme hardness—primarily in valve components, pump shafts, and precision cutting tools operating in mildly corrosive or high-wear environments. Engineers select this variant over softer austenitic stainless grades when abrasion, erosion, or galling resistance is critical, though the trade-off is lower ductility and impact toughness, making design and heat-treat control essential.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 7.300 | - | — | ||
Ultimate Tensile Strength(σUTS) | 1.810 | GPa | — | ||
Yield Strength (0.2% offset)(σy) | 1.360 | GPa | — |