EN 1.4404 Stainless Steel – Low-Carbon Weldable Chloride-Resistant Alloy

Overview

EN 1.4404 is the low-carbon variant of EN 1.4401, with a carbon content capped at 0.03%. It is specifically optimized for welded components in chloride-rich environments, eliminating intergranular corrosion in the heat-affected zone during welding without the need for post-weld annealing. This grade inherits the molybdenum-enhanced corrosion resistance of EN 1.4401, offering unmatched reliability for welded structures in harsh environments. Compared to EN 1.4401, it has enhanced ductility and weld integrity, making it the gold standard for critical equipment in chemical, marine, and pharmaceutical industries where corrosion failure is unacceptable.

Chemical Composition (wt%)

C ≤ 0.03, Cr: 16.00-18.50, Ni: 10.00-14.00, Mo: 2.00-3.00, Mn ≤ 2.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.015

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 480 MPa; Yield Strength (Rp0.2): ≥ 175 MPa; Elongation (A): ≥ 40%; Brinell Hardness (HB): ≤ 215

Core Advantages

Stable corrosion performance in weld zones without post-weld treatment; superior intergranular corrosion resistance compared to EN 1.4401; full retention of molybdenum-enhanced chloride corrosion protection; excellent weldability and ductility; non-magnetic; ideal for heavy welded components in corrosive environments.

Applications

Chemical storage tanks, offshore platform components, medical devices, welded heat exchangers, pharmaceutical pipelines, marine vessel fittings, and chemical processing pipelines.

Equivalent Grades

AISI 316L, UNS S31603, GB 022Cr17Ni12Mo2, SUS316L

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.