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Weld Star ER 2594 Stainless Steel TIG Filler Rods 2.4mm – 5kg Pack

£206.00 ex VAT

Further Reductions Available On Request 01276 505012

  • 2594
  • 5kg Pack – 2.4mm
  • Stainless Steel
SKU: 6011100227 Categories: ,



AWS A5.9 – ER 2594

A 5kg pack of 2.4mm Weld Star ER 2594 duplex stainless steel TIG welding rods.  Designed for environments where corrosion resistance is a critical consideration.  Typical applications and industries include petrochemical for the production of equipment handling corrosive substances or offshore engineering due to exposure of the corrosive effects of seawater and other environmental conditions.

This Austenitic-ferritic duplex stainless steel wire has a pitting resistance equivalent number (PREN) >40.  The high PREN number results as the metal being referred to as ‘Super Duplex Stainless Steel’.  This superior form is achieved by having higher levels of Chromium (Cr) in the chemical composition.  The additional levels of this alloy enhance the capacity of ER 2594 filler rods to withstand the effects of pitting corrosion.  Weld Star ER 2594 stainless steel TIG welding rods are also noted for their ability to withstand the effects of intergranular corrosion and stress corrosion cracking (SCC) particularly in chloride environments.

Combining increased amounts of Nickel (Ni) and Molybdenum (Mo) further enhance mechanical properties such as wear resistance, weldability and heat resistance.  Typical applications include the manufacture of oil and gas production equipment, chemical processing, aeronautic industry, marine engineering, plus general manufacturing and fabrication.

Features & Benefits
  • Excellent resistance to stress corrosion, pitting and cracking.
  • Increased toughness and hardenability.
  • Wide working temperature range.
  • Nickel (Ni) content increases ductility.
  • Lower amounts of carbon also ensure good corrosion resistance.
  • Good levels of resistance to acid based corrosion
What Is a Pitting Resistance Equivalent Number (PREN)?

This is a number which is given to stainless steel, reflecting the materials capacity for resisting the effects of pitting corrosion.  It is a predictive measurement where the higher the number obtained from the PREN calculation (see below),  the greater levels of localised pitting corrosion resistance.  There are several ways to calculate PREN; the following example is the most commonly used method:

    • PREN = %Cr (Chromium) + 3.3 × %Mo (Molybdenum) + 16 × %N (Nitrogen)

Where Austenitic-ferritic duplex stainless steel wire has a PREN >40, the weld metal is referred to as ‘Super Duplex Stainless Steel.

Typical Applications / Industries
  • Oil & Gas Production Pipework
  • Chemical Processing Plants
  • Aeronautic Industry
  • Marine Engineering
  • General Manufacturing and Fabrication


Chemical Composition % (Typical)
C% Mn% Si% S% P%
<0.03 <2.00 <1.00 <0.020 <0.030
Ni% Cr% Mo% Cu% N%
9.33 25.10 3.97 <1.50 0.24


Mechanical Properties
Tensile Strength ≥620 MPa
Yield Strength ≥550 MPa
Elongation ≥18 %
Impact Strength ≥50 J

Mechanical properties are approximate and may vary based on the heat, shielding gas, welding parameters and other factors.


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


Typical Base Materials

UNS S32750, S32760, J93380, J93404, S32550, J93370, J93372*
* Illustrative, not exhaustive list


Shielding Gases

EN ISO 14175 – TIG: I1 (Argon)


Welding Positions

EN ISO 6947 – PA, PB, PC, PD, PE, PF, PG


In Conclusion

As shown above, 2594 stainless steel TIG filler wire has excellent mechanical properties.  Particularly in the presence of highly corrosive environments.  This is due to its chemical composition which includes increased amounts of Chromium (Cr).  As an alloying component Chromium (Cr) enhances resistance to stress corrosion cracking (SCC), intergranular corrosion, but mostly localised pitting corrosion.  Additional elements such as Nickel and Molybdenum increase wear resistance, weldability and heat resistance.

Images are for illustration purposes only.




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