This is a precipitation-hardening nickel-chromium-molybdenum low-alloy steel, strengthened by aluminum and titanium additions that form fine dispersed phases during heat treatment. It is primarily used in aerospace fasteners, landing gear components, and high-strength structural applications where cryogenic toughness and corrosion resistance must be balanced with ultra-high strength. Engineers select this alloy over conventional martensitic steels when applications require superior fracture toughness at low temperatures combined with resistance to stress-corrosion cracking in marine or chemical environments.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 15.00 | - | — | ||
Ultimate Tensile Strength(σUTS) | 195.2 | ksi | — | ||
Yield Strength (0.2% offset)(σy) | 190 | ksi | — |