SUS441 Stainless Steel: Ferritic Grade with Improved Corrosion Resistance

Key Properties & Characteristics:

 

Composition: Around 18% Chromium, stabilized with Titanium (Ti) and Niobium (Nb).

Corrosion Resistance: Good in various environments, including chloride solutions, offering resistance similar to Type 304 but excelling in high-heat exhaust gas conditions.

High-Temperature Strength: Superior oxidation and high-temperature strength compared to Type 409 and 439, with good creep resistance.

Weldability: Good weldability with excellent resistance to weld decay (sensitization) due to stabilization.

Formability: Good ductility and deep drawing capabilities.

Common Applications:

Automotive exhaust systems (manifolds, catalytic converters).

Heat exchangers.

Industrial equipment in corrosive/high-temp settings.

Architectural cladding (in suitable environments).

Grades & Equivalents:

UNS: S44100 (or S43940).

EN/DIN: 1.4509 (or X2CrTiNb18).

JIS: SUS441.