Grade 409 stainless steel is a Ferritic steel that offers good mechanical properties and high-temperature corrosion resistance. It is commonly considered as a chromium stainless steel, with applications in exhaust systems of automobiles and applications that demand weldability.

Available forms:  Coils, Sheets, Strips, Welded Tubes, Profiles

Chemical Analysis

Chemical Compositions*

Element % Present (in product form)
Carbon (C) 0.030
Silicon (Si) 1.00
Manganese (Mn) 1.00
Phosphorous (P) 0.040
Sulfur (S) 0.015
Chromium (Cr) 10.50 – 12.50
Molybdenum (Mo) 6 x (C+N) to 0.65
Iron (Fe) Balance

Mechanical properties (at room temperature in annealed condition)

Product Form
Thickness (mm) Max 8 13.5
Yield Strength Rp0.2 N/mm2 Longitudinal 210
Transverse 220
Tensile Strength Rm N/mm2 380 – 560
Elongation min. in % A80mm1) <3mm (longitudunal + transverse) 25
A2) ≥3mm (longitudinal + transverse)

Usage Areas

  • Automotive exhaust tubing
  • Catalytic converter systems
  • Mufflers