K41X – 1.4509

K41X – 1.4509

K41X – 1.4509

Our KARA range. The “X” means that this 18% chromium titanium-and niobium-stabilized Ferritic Stainless Steel is ideal for exhaust applications.

Main features

Good weldability; ease of forming; good resistance to corrosion (in cold part of exhaust systems), pitting corrosion, and high temperature oxidation (up to 950°C); enhanced hot mechanical properties (without risk of σ phase formation at intermediate temperatures); greater thermal conductivity and lower expansion coefficient than austenitic grades.


  • Vehicles exhaust systems (manifold, tube, catalytic converter and muffler shell)
K41X – 1.4509


  • ASTM 441
  • UNS S43932
  • EN 1.4509
  • IMDS ID 336816606

Chemical Composition

Typical values

  • C=0.015
  • Si=0.60
  • Mn=0.30
  • Cr=17.80
  • Mo=0.30
  • N=0.015
  • Ti+Nb=0.65

Alphanumerical designation: X2CrTiNb18

Dimensional range


  • Thickness: from 0.40 to 4 mm
  • Width: up to 1,500 mm acc. to thickness


  • Thickness: from 0.80 to 2 mm
  • Diameter: 8 up to 168 mm acc. to thickness


Surface aspect

  • Cold rolled
  • 2B, 2D
  • HRAP: please consult

According to forms & dimensions.


Whether you need a certificate or more information, you can download all our product brochures, specifications, e-books, and related materials here.
K41X (1.4509) - Exhaust

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