Dynaweld 2% Thoriated Tungsten Electrode EWTh-2 / WT20
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1 Day delivery all over UAENov 09 - Nov 13
The Dynaweld 2% thoriated tungsten electrode (EWTh-2 / WT20) is a ground-finish TIG electrode made in Italy and third-party certified to AWS A5.12M and ISO 6848. Its 2% thorium oxide content gives easy arc starting, a stable, focused arc on DC− and good current capacity, making it a long-established choice for TIG welding carbon and stainless steel. Supplied in 175 mm lengths, 10 pieces per pack, identified by a red band.
Key Features & Benefits
- Easy arc starting: thorium oxide lowers the work function of the tip for reliable ignition, including at low current.
- Stable, focused arc on DC−: narrow, deep-penetrating welds with little arc wander.
- Higher current capacity than pure tungsten of the same diameter.
- Long electrode life: holds a sharp point on DC, so less regrinding.
- Ground finish: consistent diameter and tip geometry from the first strike.
- Red band to ISO 6848 / AWS A5.12M for easy identification in stock.
Technical Specifications
| Classification | EWTh-2 (AWS A5.12M) · WT20 (ISO 6848) |
|---|---|
| Certification | Third-party certified |
| Composition | Tungsten + 2.0% thorium oxide (ThO₂) |
| Colour band | Red |
| Finish | Ground |
| Length | 175 mm |
| Pack | 10 pcs |
| Polarity | DC− (electrode negative); not recommended for AC aluminium welding |
| Process | TIG (GTAW) |
| Tip preparation | Pointed / truncated point (DC) |
| Origin | Made in Italy |
Size Range & Welding Current Guide (DC−)
| Item code | Diameter | Current range (A) | Typical (A) | Typical use |
|---|---|---|---|---|
| DW-WTH2-1.6-175 | 1.6 mm (1/16") | 60–150 | 80–130 | Thin stainless, precision TIG |
| DW-WTH2-2.4-175 | 2.4 mm (3/32") | 150–250 | 170–230 | Stainless, mild & carbon steel – general TIG |
| DW-WTH2-3.2-175 | 3.2 mm (1/8") | 225–330 | 250–310 | Medium–heavy stainless, carbon & alloy steel |
| DW-WTH2-4.0-175 | 4.0 mm (5/32") | 350–480 | 380–450 | Heavy plate, pipe, high-current DC TIG |
Approximate current ranges for DC− (electrode negative) with argon shielding, per AWS A5.12M:2009 / ISO 6848, Annex A, Table A.2. Actual settings depend on shielding gas, equipment, electrode extension and application. Other lengths (150, 250, 300, 450 mm) and diameters on request.
Applications
- Carbon and low-alloy steel TIG welding
- Stainless steel pipe, sheet and fabrication
- Oil & gas pipeline root passes
- Petrochemical and refinery piping
- Power plant boiler and heat-exchanger tubes
- Structural and heavy plate fabrication
For AC welding of aluminium, a ceriated (EWCe-2, grey) or lanthanated (EWLa-1.5, gold) electrode is advised instead.
Safety Note: Thorium Oxide
This electrode contains thorium oxide (ThO₂), which is mildly radioactive. Grind only with local exhaust extraction and a P3 respirator, and collect grinding dust and spent electrodes for disposal under local regulations.
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Supply in UAE, Saudi Arabia & Qatar
Global Hardware & Tools LLC supplies Dynaweld tungsten electrodes from our head office in Abu Dhabi, with delivery across the UAE, to Riyadh and Dammam in Saudi Arabia, and to Doha in Qatar. Prices are on request: send us the diameter and quantity you need on WhatsApp or by phone for a quick quote.