Indaten® - Atmospheric corrosion resistant steels

Technical information

Indaten® is a structural steel with improved resistance to atmospheric corrosion, forming a changing protective patina that evolves with the environment.

  • Dimensions: from 1.7 up to 80 mm thick; for thinner thicknesses: 0.5 to 2 mm thick
  • Mill finish for coils and sheets: pickled up to 7 mm thickness
  • Surface preparation: pickling and degreasing in order to obtain a finely grained patina
  • Coating: excellent adhesion of organic coating; the protective layer prevents rust propagation under the paint layer
  • Assembling: by welding or riveting and bolting with Indaten® or stainless steel parts
  • Welding: excellent weldability with all the usual welding processes.


  • For Hot Rolled steel: Indaten® 355A & Indaten® 355D
  • For Heavy Plate: Indaten®355H
  • For Cold Rolled steel: Indaten® HC315WP

Recommendations: not to be exposed to condensation, repeated soiling, chlorine, or a marine atmosphere.

Best in Class

Self-protecting steel with raw aesthetics

Ideal steel for building exteriors, facades, and structures of buildings and bridges

  • Appealing aesthetics
  • Self-protection requiring no maintenance
  • Excellent corrosion protection when post painted
  • Wide product range from thin thickness to thick plates
  • Large palette of applications from buildings, bridges to perforated metal and dust collectors
  • High-longevity
  • Eco-friendly and 100% recyclable

Attractive, aesthetically pleasing appearance

  • Authentic, natural colour
  • Evolving patina over time
  • In harmony with natural and urban environments

Economic advantages

  • No need to re-protect, no painting costs
  • Long term durability and no maintenance costs
  • No maintenance = no disturbance: Bridges and infrastructure do not need to be closed to maintain the weathering steel


  • Wide product range from thin thickness to thick plates
  • Easy to process with the same tools as structural steel
  • Welding consumables available
  • No extra processing or equipment costs

Design and conception

  • Similar standards (for example, Eurocodes) to structural steels
  • Similar calculation tools
  • Speed of construction


  • No waste management needed on site when repainting is needed
  • No additional corrosion protection needed, no repainting
  • No volatile organic compounds (VOCs) emitted to air or water during site operation
  • Low carbon footprint

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