13Cr martensitic stainless steel (variant 12) is a chromium-based stainless steel hardened through martensitic transformation, alloyed with molybdenum, cobalt, and nickel to enhance strength and toughness. This variant is engineered for demanding applications requiring high hardness and wear resistance combined with corrosion protection, making it suitable for aerospace components, high-performance valve bodies, and turbomachinery where superior fatigue resistance and thermal stability are critical. The cobalt addition (≈13%) distinguishes this variant as a premium martensitic grade, prioritizing performance over cost-efficiency, with particular value in rotating equipment and critical load-bearing structures exposed to aggressive or elevated-temperature service environments.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 16.20 | - | — | ||
Ultimate Tensile Strength(σUTS) | 1.774 | GPa | — | ||
Yield Strength (0.2% offset)(σy) | 1.384 | GPa | — |