17.6Ni-1.8Mo is a precipitation-hardening low-alloy steel engineered for high-strength applications requiring excellent toughness and fatigue resistance. The high nickel content (17.6%) combined with molybdenum and titanium creates a martensitic matrix capable of age hardening, making it suitable for demanding structural and mechanical components that must withstand cyclic loading and impact without brittleness. This steel family is primarily used in aerospace, defense, and high-performance industrial equipment where weight reduction and reliability are critical—engineers select it over conventional carbon steels when applications demand the strength-to-weight ratio and fracture toughness that precipitation hardening provides.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 13.00 | - | — | ||
Ultimate Tensile Strength(σUTS) | 265.9 | ksi | — | ||
Yield Strength (0.2% offset)(σy) | 248.9 | ksi | — |