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.
ASTM A240 for annealed condition
ASTM A666 for tempered material*
|Composition per ASTM A240|
|Chromium||17.50 – 19.50|
|Titanium||0.10 – 0.50|
|Mechanical Properties (Annealed, Per ASTM A240)|
|UTS||65,000 ksi Min|
* Tempered mechanical properties are available upon request.
441 flat rolled stainless steel is magnetic in all conditions.
Type 441 has good ductility and can be formed into most shapes.