15Ni-9Co-3.0Mo Maraging Steel

metal

15Ni-9Co-3.0Mo maraging steel is an iron-based superalloy strengthened through precipitation hardening of intermetallic phases (notably Ni₃Mo), rather than carbon content, enabling a combination of very high strength with good toughness and damage tolerance. It is widely used in aerospace and defense applications—particularly in rocket motor cases, landing gear, and fasteners—where the alloy's ability to maintain strength at elevated temperatures combined with excellent fracture toughness and low distortion during heat treatment outweighs the cost premium versus conventional steels. Engineers select this material when weight reduction and structural reliability are critical and fatigue or impact resistance cannot be compromised.

rocket motor casesaerospace landing gearhigh-strength fastenersmilitary ordnancestructural components requiring low distortion heat treatmenthigh-performance tooling

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)	—	Pa	—	—
Yield Strength (0.2% offset)(σy)	—	Pa	—	—

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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.