13Cr Martensitic Stainless (var. 5)

metal

13Cr Martensitic Stainless Steel (variant 5) is a precipitation-hardened martensitic stainless steel with elevated cobalt and silicon content, designed to achieve high strength through age-hardening treatment while maintaining corrosion resistance typical of 13% chromium steels. This variant is primarily used in aerospace and defense applications where a combination of high strength, corrosion resistance, and moderate toughness is required, particularly in fasteners, turbine components, and structural elements exposed to moderately corrosive environments. The cobalt and molybdenum additions enhance strength and fatigue performance compared to conventional 13Cr martensitic grades, making it competitive with nickel-based alternatives in weight-sensitive applications where cost and machinability are considerations.

Aerospace fasteners and structural componentsTurbine blades and engine hardwareOil & gas downhole toolsHigh-strength corrosion-resistant fastenersMilitary ordnance and defense systemsPump shafts and impellers

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Elongation at Break(εf)
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-——
Ultimate Tensile Strength(σUTS)
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ksi——
Yield Strength (0.2% offset)(σy)
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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.