14Cr Martensitic Stainless (var. 4)

metal

A precipitation-hardened martensitic stainless steel containing 13.5% chromium, 5.34% molybdenum, and elevated carbon (0.479%) with cobalt additions, designed for ultra-high strength applications requiring corrosion resistance. This variant represents a specialized composition optimized for aerospace, defense, and industrial tooling where exceptional hardness and fatigue performance must be maintained in corrosive or marine environments. The Mo-Co-C combination enables strength levels significantly above standard 400-series martensitic stainless steels while preserving inherent corrosion resistance, making it a premium choice where weight savings and wear resistance justify the material cost.

aerospace fasteners and landing gearhigh-strength surgical instrumentsindustrial cutting tools and diesmarine pump and valve componentsdefense ordnance and armor applicationsprecision bearings and races

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property OverviewNormalized to typical max values

Property	Value	Unit	Conditions
Elongation at Break(εf)	2.000	-	—
Ultimate Tensile Strength(σUTS)	260.4	ksi	—
Yield Strength (0.2% offset)(σy)	178.2	ksi	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

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.

14Cr Martensitic Stainless (var. 4)

Mechanical Properties

Regulatory Screening

Environmental

Quality & Standards

Industry-Specific