ABRAFIL UP 25 9 4L

ABRAFIL UP 25 9 4L

Super Duplex flux-cored wire

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Product description

Submerged wire for welding “Super duplex” stainless steels Also suitable for joining “duplex” steels where optimum corrosion resistance is required

Increased resistance to intergranular, pitting and stress corrosion cracking.

Exceptionally high mechanical properties.

Product application instructions

Flux ABF 8.7 Sp

Chemical composition in weight percent, conventionaly expressed in oxides, except for fluor and alloying elements
Grain size : 14 – 60 N° ASTM
Basicity index : 2,0 (Boniszewski)
Apparent density : 1,0 Kg/dm3
Potential water : < 0.2% Flux Density F: 25 SiO2: 10 CaO+MgO: 35 Al2O3: 35 K2O+Na2O: 2

Classification

AWS A5.9 EN ISO 14343-A W. nr.
ER 2594 25 9 4 N L 1.4501

Chemical analysis (%)

C Cr Cu Mn Mo N Ni P S If W
0.015 25.13 0.62 0.75 3.65 0.23 9.33 0.024 0.001 0.27 0.61

Mechanical characteristics

ReL N/mm² (N/mm²) Rm N/mm² (N/mm²) A5 (%)
550 620 18

Why choose ABRAFIL UP 25.9.4L?

1. High resistance to corrosion (localized and stress)

  • Superduplex combines a high chromium (~25%), molybdenum (~4%), and nitrogen (~0.3%) content → exceptional resistance to :

    • pitting corrosion

    • cavernous corrosion

    • chloride-induced stress cracking

  • Ideal for marine, offshore, desalination and heavy chemical environments.

2. Excellent mechanical properties

  • Thanks to their balanced austenitic-ferritic structure, superduplex welds offer :

    • high yield strength (~550 MPa)

    • excellent tensile and fatigue strength

    • good toughness, even at low temperatures

  • Often enables reduced wall thicknesses compared to austenitic stainless steels.

3. Optimized for submerged welding (SAW)

  • The SAW process, combined with superduplex wire, enables :

    • deep, clean welds

    • high deposit rate (rapid production)

    • very regular welds, ideal for mass production or large assemblies

  • Use with ABF 8.7Sp flux to preserve ferrite/austenite balance.