12Cr-8Ni-2.9Mo Stainless (var. 3)

metal

This is a precipitation-hardened martensitic stainless steel with significant aluminum and cobalt additions, designed for high-strength applications requiring corrosion resistance and hardness. The composition—dominated by iron with 12% chromium, 8% nickel, and nearly 2.5% aluminum—positions it in the family of age-hardenable stainless steels, where the Al and Co promote strengthening through intermetallic precipitation. It is used in aerospace, defense, and high-performance industrial applications where a combination of corrosion resistance, elevated-temperature stability, and exceptional strength-to-weight ratio is critical, offering advantages over traditional austenitic stainless steels or lower-strength martensitic grades in demanding structural and component applications.

aerospace fasteners and structural componentsjet engine turbine discs and casingshigh-strength corrosion-resistant hardwaredefense and military ordnancepressure vessels and steam turbineslanding gear and bearing races

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.