441 Rolled Coil Stainless Steel

Type 441 (UNS S44100) is a ferritic rolled coil stainless steel with a niobium (columbium) addition that has good oxidation and corrosion resistance, as well as good high-temperature strength. 441 is similar to AK Steel 18 Cr-Cb™.

441 rolled coil stainless steel is used mainly for high-temperature settings and corrosive environments, particularly automotive-exhaust system components.

441 Stainless Steal Specifications:

ASTM A240 for annealed condition
ASTM A666 for tempered material*

Composition per ASTM A240
Carbon .030 Max
Manganese 1.00 Max
Phosphorus .040 Max
Sulfur .030 Max
Silicon 1.00 Max
Chromium 17.50 – 19.50
Nickel 1.00 Max
Nitrogen .030 Max
Titanium 0.10 – 0.50
Mechanical Properties (Annealed, Per ASTM A240)
UTS 65,000 ksi Min

* Tempered mechanical properties are available upon request.

441 Stainless Steel Applications:


  • Exhaust manifold and other exhaust-system components
  • Catalytic converter shells
  • Clamps

Magnetic Properties:

441 flat rolled stainless steel is magnetic in all conditions.


Type 441 has good ductility and can be formed into most shapes.

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