K44X – 1.4521

K44X – 1.4521

K44X – 1.4521

Our KARA range. The “X” means that this 19% chromium with molybdenum, niobium stabilised Ferritic Stainless Steel is ideal for exhaust applications.

Main features

Good weldability; ease of forming; good resistance to corrosion (in exhaust gas environments) and high temperature oxidation and creep (up to 1050°C); good durability in thermal fatigue; enhanced hot mechanical properties (without risk of σ phase formation at intermediate temperatures); greater thermal conductivity and lower expansion coefficient than austenitic grades.


  • A range of parts used in vehicles exhaust line and engines (manifolds, tubes, particulate filter, catalysor shells and EGR systems)
K44X – 1.4521


  • ASTM 444
  • UNS S44400
  • EN 1.4521
  • IMDS ID 336853368

Chemical Composition

Typical values

  • C=0.015
  • Si=0.40
  • Mn=0.30
  • Cr=19.00
  • N=0.015
  • Nb=0.60

Alphanumerical designation X2CrMoTi18-2

Dimensional range


  • Thickness: from 1.50 to 2 mm
  • Width: up to 1,250  mm

Precision Strip

  • Thickness: from 0.06 to 2.5 mm
  • Width: from 3 to 700 mm

Precision Sheet

  • Thickness: from 0.20 to 2.5 mm
  • Width: from 40 to 670 mm


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

Surface finishes

  • Cold rolled
  • 2D
  • 2R, 2B, 2D, 2H, 2G (Precision products)

According to thickness.


Whether you need a certificate or more information, you can download all our product brochures, specifications, e-books, and related materials here.
K44X (1.4521) - Exhaust

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