A high-nickel low-alloy steel containing approximately 20% nickel, 1.2% molybdenum, and 2.25% titanium with very low carbon content (0.05%), this material is engineered to provide exceptional strength-to-weight performance combined with corrosion and wear resistance. Historically used in aerospace landing gear, rocket motor casings, and high-strength fasteners where extreme reliability under cyclic loading and harsh environments is critical. The high nickel content and molybdenum additions create a material notable for maintaining toughness at cryogenic temperatures and resisting hydrogen embrittlement, making it preferred over conventional structural steels in applications involving liquefied propellants or high-pressure hydrogen service.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 6.000 | - | — | ||
Ultimate Tensile Strength(σUTS) | 273.9 | ksi | — | ||
Yield Strength (0.2% offset)(σy) | 240.9 | ksi | — |