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Thermanit 25/09 CuT TIG rod: Böhler Welding TIG rods in an R20 box, uncoppered
Thermanit, TIG rod, duplex

Thermanit 25/09 CuT TIG rod

EN ISO classification14343-A W 25 9 4 N L
AWS classificationA5.9 ER 2594
Shielding gasI1: 100 % argon
ApprovalsTÜV (18929), ABS, DNV, CE
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Authorised distributorvoestalpine Böhler Welding
Courier shippingfrom the warehouse in Krotoszyn
Data sheetcomposition, properties, specifications
Wire selectionhelp from a welding engineer
Manufacturer data sheet
Application Specifications Manufacturer datasheet Fits Substitute Bought together
Application

What Thermanit 25/09 CuT TIG rod is used for

Thermanit 25/09 CuT is a high alloyed TIG rod for superduplex steels. It works on chemical installations, desalination plant, tanks and offshore structures in two phase steels.

Base materials include 1.4410, 1.4467, 1.4468, 1.4501, 1.4507, 1.4515 and 1.4517. The deposit matches the superduplex grades.

  • Classification EN ISO: 14343-A W 25 9 4 N L
  • AWS classification: A5.9 ER 2594
  • Shielding gas: I1
  • Diameters: 1.0 / 1.2 / 1.5 / 1.6 / 2.0 / 2.4 / 3.2 mm
  • Approvals: TÜV (18929), ABS, DNV, CE

Do not quench the joint with water or force the cooling, too fast a cooling rate leaves too much ferrite in the weld. Set the gas post-flow long enough for the pool and the electrode to cool under the shield. Grind the tungsten tip along its axis and hold a short arc, otherwise the pool spreads. Thinner diameters suit root runs and thin sheet, thicker ones suit filling.

Manufacturer datasheet

Chemical composition and properties from the manufacturer datasheet

Datasheet PDF

Typical weld metal values from the voestalpine Böhler Welding data sheet, issue 03/2026. The minimum or the range guaranteed by the maker is given in brackets. The figures depend on the heat treatment condition and the shielding gas stated in the row and do not replace testing the joint to your own WPS.

Welding data and approvals
Polaritydirect current, electrode negative (DC-)
ApprovalsTÜV (18929), DNV, CE
Datasheet edition03/2026
Mechanical properties of the all-weld metal, typical values
Condition Yield strength Re, MPa Tensile strength Rm, MPa Elongation A, % Impact energy KV, J at 20 °C Impact energy KV, J at -50 °C
u 640 (min. 600) 830 (min. 760) 28 (min. 25) 100 (min. 80) 60 (min. 47)
  • u: untreated, as-welded
Fits

For which materials and machines

Base materials
  • 1.4410
  • 1.4467
  • 1.4468
  • 1.4501
  • 1.4507
  • 1.4515
  • 1.4517
  • UNS S32750
Process and machines

TIG rod, works on any sound machine for this process: welders. Shielding gas: I1: 100 % argon.

Used welders New welders Ask us to help you choose
Technical substitute

Consumables with the same classification

Same material group, matching classification, a shared diameter and the same shielding gas. Confirm any substitute for your WPS in the documentation.

From the same group

Other consumables for the same material

For comparison before you buy. A technical substitute is listed above.

All: TIG welding rods