0.09C 5.1Cr-1.9Mo-11.6Ni Low Alloy Steel

metal

A precipitation-hardening nickel-chromium-molybdenum low alloy steel with controlled carbon content and aluminum addition, designed to achieve high strength through heat treatment while maintaining reasonable toughness and ductility. This composition family is primarily used in aerospace and defense applications requiring high-strength fasteners, landing gear components, and structural parts that must withstand demanding service conditions at moderate temperatures. The combination of nickel for toughness, chromium for corrosion resistance, molybdenum for strength and creep resistance, and aluminum for precipitation hardening makes this alloy a preferred choice over simpler steels when weight savings and reliability in high-stress environments justify the material cost.

aerospace fasteners and boltsaircraft landing gearhigh-strength structural componentsdefense weapons systemspressure vesselsturbine engine housings

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.