13Cr Martensitic Stainless Steel (variant 20) is a chromium-based martensitic stainless steel with elevated carbon content and molybdenum additions, designed for high-strength corrosion-resistant applications. This material is primarily used in aerospace, power generation, and oil & gas industries where components must withstand both corrosive environments and significant mechanical loads—such as turbine blades, compressor components, and downhole tools. The martensitic structure and alloying strategy (chromium for corrosion resistance, molybdenum for strength and pitting resistance, nickel for toughness) make it a preferred choice over softer austenitic grades when hardness, fatigue resistance, and dimensional stability are critical, though it trades some ductility and weldability for superior strength.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 13.60 | - | — | ||
Ultimate Tensile Strength(σUTS) | 256.7 | ksi | — | ||
Yield Strength (0.2% offset)(σy) | 188.5 | ksi | — |