0.05C 8.3Cr-1.8Mo-9.9Ni Low Alloy Steel

metal

This is a ultra-high-strength low-alloy steel characterized by very low carbon content (0.05%) combined with significant chromium (8.3%), nickel (9.9%), and molybdenum (1.8%) additions, plus notable aluminum (1.39%) for precipitation hardening. The composition targets exceptional strength-to-weight performance with improved toughness and corrosion resistance compared to conventional high-strength steels, making it suitable for aerospace, defense, and critical structural applications where weight savings and reliability are paramount. This material family is particularly valued in applications demanding both extreme strength and damage tolerance, where traditional martensitic hardened steels would be brittle or prone to stress-corrosion cracking.

landing gear and airframe componentshigh-strength fasteners and boltshelicopter rotor hubspressure vessel constructionarmor and ballistic protectionaerospace structural forgings

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.