0.05C 5.1Cr-1.8Mo-9.7Ni Low Alloy Steel

metal

This is a precipitation-hardening nickel-chromium-molybdenum low-alloy steel, engineered for high-strength aerospace and defense applications where combined strength, toughness, and corrosion resistance are critical. The composition—dominated by ~10% nickel and ~5% chromium with molybdenum for strength and aluminum/titanium for precipitation hardening—positions this steel as a workhorse for landing gear, fasteners, and structural components in military and commercial aircraft. Its appeal over martensitic stainless steels or conventional high-strength steels lies in achieving ultra-high strength levels while maintaining fracture toughness and environmental resistance, making it essential where weight savings and reliability cannot be compromised.

aircraft landing gearaerospace fastenersmilitary structural componentshigh-strength bolts and forgingspressure vessels (aerospace/defense)helicopter rotor hubs

Compliance & Regulations

?ISO 10993?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Elongation at Break(εf)	—	-	—	—
Ultimate Tensile Strength(σUTS)	—	ksi	—	—
Yield Strength (0.2% offset)(σy)	—	ksi	—	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Safety & Biocompatibility

Quality & Standards

Industry-Specific

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.