Exaton 29.8.2.L (GTAW)

Exaton 29.8.2.L is a high‑performance GTAW filler metal designed for super‑duplex stainless steels such as SAF™ 2906 and SAF™ 3006, offering excellent corrosion resistance in aggressive acid and caustic environments.

Key Features

• Optimized chemistry with high Cr (29%) and Mo (2%) for superior resistance to acids (HCl, H₂SO₄, organic acids, HCOOH) and caustics (NaOH, KOH).
• Consistent wire quality batch‑to‑batch, ensuring reliable welds without extensive parameter trimming.
• Available in 5 kg drums, 2.4 mm, 2.0 mm and 1.6 mm diameters, 1000 mm length.
• Low moisture steel‑drum packaging protects flux and reduces shipping damage.

Specifications

• Classifications: EN ISO 14343‑A : W 29 8 2 N L
• Approvals: CE EN 13479, UKCA EN 13479
• Alloy Type: Austenitic‑ferritic (duplex) ~50 % ferrite, 29 % Cr, 7 % Ni, 2 % Mo, low C
• Shielding Gas: N₂ (EN ISO 14175)
• Tensile (As Welded): Yield 730‑750 MPa, Tensile 870‑880 MPa, Elongation 25 %
• Charpy Impact (As Welded, 20 °C): 165‑180 J
• Typical Weld Metal Analysis (%): C 0.016‑0.020, Mn 0.9, Si 0.3, S 0.001, P 0.017, Ni 6.7, Cr 29, Mo 2.2, Cu 0.14‑0.15, N 0.2‑0.3, Nb 0.003, Ti 0.001, Co 0.07, PRE 40‑41
• Typical Wire Composition (%): C < 0.025, Mn 1.0, Si 0.4, S 0.0005, P 0.015, Ni 7, Cr 29, Mo 2.2, Cu 0.11, N 0.3, Nb 0.01, Ti 0.003, Co 0.07, PRE 41.7

Applications

• Welding of piping systems and heat exchangers for acid service (hydrochloric, sulfuric, organic, formic acids).
• Alumina production environments.
• Services requiring high resistance to caustic solutions such as sodium hydroxide and potassium hydroxide.