Exaton 25.22.2.LMn (GTAW)

Exaton 25.22.2.LMn is a manganese‑alloyed chromium‑nickel‑molybdenum filler material for GTAW, offering excellent low‑temperature toughness for cryogenic stainless‑steel service.

Key Features

• High corrosion resistance with increased Cr and Mo content
• Consistent chemistry and mechanical properties batch‑to‑batch
• Low moisture, steel‑drum packaging for better flux protection
• Suitable for high‑pressure urea process equipment and other corrosive environments

Specifications

• Alloy Type: Austenitic, 25% Cr – 22% Ni – 2.2% Mo – low C
• Shielding Gas: I1 (EN ISO 14175)
• Classifications: EN ISO 14343‑A W 25 22 2 N L, SFA/AWS A5.9 ERG, Werkstoffnummer ~ 1.4466
• Approvals: CE EN 13479, UKCA EN 13479, VdTÜV 03102
• Tensile (As Welded): Yield 335 MPa, Tensile 580 MPa, Elongation 42 %
• Charpy Impact (As Welded): 120 J at 20 °C, 100 J at –196 °C
• Typical Weld Metal Analysis (%): C 0.011, Mn 4.4, Si 0.10, S 0.002, P 0.012, Ni 21.9, Cr 25.1, Mo 2.2, Cu 0.04, N 0.12, Nb 0.01, Co 0.03, B 0.0016
• Typical Wire Composition (%): C 0.010, Mn 4.6, Si 0.12, S 0.003, P 0.013, Ni 22, Cr 25, Mo 2.2, Cu 0.02, N 0.14, Nb 0.01, Co 0.03, B 0.0018

Applications

• Cryogenic stainless‑steel joining (UNS S31050, EN 1.4466)
• High‑pressure units in urea processes (stripper tubes, bimetallic outer layers, ferrules, carbamate condensers, decomposers, reactor coils)
• Corrosive environments in fertilizer plants (nitric acid coolers, heating coils, NPK process equipment)