1.4401 – Molybdenum-Enhanced EN Austenitic Steel: Chloride Corrosion Resistant Alloy

Overview

1.4401 is a high-quality European standard austenitic stainless steel, corresponding to AISI 316, with the key addition of 2.00-3.00% molybdenum that greatly enhances its pitting and crevice corrosion resistance in chloride-containing environments. It contains 16.00-18.00% chromium and 10.00-14.00% nickel, forming a stable face-centered cubic austenitic structure that is non-magnetic after annealing. This grade exhibits excellent ductility, cold forming capability, and weldability, requiring no complex preheating or post-weld treatment for most applications. Compared to 1.4301, it offers superior performance in seawater, salt mist, and mild chemical environments, making it the preferred material for moderate corrosive conditions in European industrial sectors.

Chemical Composition (wt%)

C ≤ 0.08, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.030, Cr: 16.00-18.00, Ni: 10.00-14.00, Mo: 2.00-3.00

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 520 MPa; Yield Strength (Rp0.2): ≥ 205 MPa; Elongation (A): ≥ 40%; Brinell Hardness (HB): ≤ 187

Core Advantages

Molybdenum addition significantly improves resistance to chloride-induced pitting and crevice corrosion; meets strict European EN standards for quality control; non-magnetic and highly ductile for versatile forming; reliable weldability with minimal post-processing; balanced mechanical strength and corrosion resistance.

Applications

Coastal architectural structures in Europe, marine hardware, chemical pressure vessels, food and pharmaceutical equipment, pulp and paper machinery, and water treatment systems.

Equivalent Grades

AISI 316, UNS S31600, STS316, SUS316, GB 06Cr17Ni12Mo2

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.