13Cr Martensitic Stainless (var. 18)

metal

13Cr martensitic stainless steel (variant 18) is a chromium-bearing iron alloy with elevated carbon and molybdenum content, designed to achieve high strength through martensitic heat treatment while maintaining corrosion resistance. This material is used in demanding applications where both wear resistance and moderate corrosion protection are required, such as hydraulic components, fasteners, and cutlery—selected by engineers who need the hardness and strength of martensitic stainless without the brittleness of fully hardened tool steels. The molybdenum addition improves toughness and corrosion performance compared to standard 13% chromium grades, making it a practical choice for oil & gas valves, pumps, and other high-stress environments where aqueous or mildly corrosive exposure is expected.

hydraulic components and valve bodiesoil & gas downhole toolspump shafts and impellersfasteners and threaded componentscutlery and edged toolsbearing races and wear surfaces

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