11Ni-13Co Maraging Steel (var. 4)

metal

11Ni-13Co maraging steel (variant 4) is an ultra-high-strength iron-nickel-cobalt alloy strengthened primarily through precipitation hardening rather than carbon content, making it exceptionally tough and damage-tolerant compared to conventional high-carbon steels. It is widely used in aerospace, defense, and precision tooling applications where extreme strength combined with adequate fracture toughness is critical—particularly in rocket motor cases, landing gear, ejection seats, and high-performance die-casting dies. Engineers select this material when conventional alloys cannot meet simultaneous demands for very high strength and impact resistance, or when tight dimensional tolerances and excellent machinability in the solution-treated condition are essential before final aging.

aerospace structures and fastenersrocket motor caseslanding gear componentsprecision injection/die-casting moldshigh-performance toolingdefense and military applications

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.