17Ni-8Co-3.0Mo-1.8Ti Maraging Steel

metal

17Ni-8Co-3.0Mo-1.8Ti is an ultra-high-strength maraging steel engineered through age-hardening precipitation of intermetallic phases rather than carbon-based hardening, enabling it to achieve exceptional strength with minimal brittleness. Widely adopted in aerospace and defense applications—particularly for critical structural components, landing gear, rocket motor casings, and aircraft fasteners—this alloy is chosen when weight reduction and damage tolerance are as important as absolute strength, offering superior toughness compared to conventional heat-treated steels at comparable strength levels.

aerospace structural componentsrocket motor casingsaircraft landing gearhigh-performance fastenersaerospace toolingmilitary ordnance systems

Compliance & Regulations

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

Units:

si imperial

Property OverviewNormalized to typical max values

Property	Value	Unit	Conditions
Elongation at Break(εf)	8.000	-	—
Ultimate Tensile Strength(σUTS)	348.8	ksi	—
Yield Strength (0.2% offset)(σy)	341.8	ksi	—

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Regulatory Screening

Environmental

Export Control

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.