Outokumpu 1.4318 Datasheet

Wrought Stainless Steel

Supplied by Outokumpu

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Product Description
Austenitic stainless steel
Type X2CrNiN18-7 stainless steel: EN 1.4318, AISI 301LN, low carbon, high nitrogen

  • Generally used for structural parts where high strength and toughness are needed beside a corrosion resistance similar to grade 1.4301 / AISI 304.
  • When hardened by cold working (surface finish 2H or TR), the strength and corrosion resistance of this steel grade steel is utilized in structural applications, like in transportation vehicles.
  • The combination between ductility and toughness is excellent even at low temperatures.

  • Weldability is good. The thermal expansion is 1,5-times larger compared with carbon steels.
  • Chromium and nickel contents of the filler metal have to match or to be higher than the composition of the base metal, e.g. type 19-9.
  • Cleaning the weld seam has a significant importance for corrosion resistance. Pickling is recommended.

Forming and machining
  • Work hardening is pronounced due to high work hardening rate and formation of martensite in the range of larger deformations.
  • Formability is good, thus forces needed and the elastic return is bigger compared with carbon steels and even when compared with grade 1.4301 / AISI 304.
  • Because of high ductility and work hardening it is recommended to use sharp cutting tools and an effective cooling and adequate feed of tool when machined.

Corrosion resistance
  • Corrosion resistance is comparable to grade 1.4301 / AISI 304.
  • Resistance to atmospheric corrosion is adequate for several applications. Special attention should be paid on surface finish and regular cleaning procedures in marine and industrial environments.
  • In chloride containing solutions pitting and crevice corrosion is possible depending on various parameters like chloride concentration, temperature, pH value, redox potential, crevice geometry and others.
  • When the temperature of chloride containing solutions exceeds 50°C and the construction is loaded, stress corrosion cracking is possible.
  • The best material performance is reached usually with the help of adequate design, correct post-weld treatment and regular cleaning during use (if applicable).
Material Status 
  • Commercial: Active
  • Africa & Middle East
  • Asia Pacific
  • Europe
  • Latin America
  • North America
Available Documents
Technical Datasheet (English)
Metals General
Nominal Value
Applicable Specifications
Metal Type
Alloy Identification
Metals Type Analysis
Nominal Value
Type Analysis
Iron (Balance)
Metals Physical
Nominal Value
Metals Mechanical
Nominal Value
Tensile Strength (Ultimate)
Tensile Strength (Yield), 0.2%
Tensile Elongation (Break)
Metals Thermal
Nominal Value
Mean CTE (68 to 212°F)
Thermal Conductivity (68°F)
1Typical properties: these are not to be construed as specifications.
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