Use & Application
The consumables deposit Cr-Ni-Mo-Cu weld metal with a high corrosion resistance to organic acids and hot sulphuric acid. The high nickel content gives good resistance to stress corrosion cracking in chloride and H2S environments. Applications include tanks and process vessels, pipework systems, heat exchangers, agitators and rotors, and cast pumps and valves for use in the chemical processing and increasingly offshore oil and gas industries. Also suitable for corrosion resistant overlays and for welding dissimilar materials. No preheat required, interpass should be restricted to 150)C maximum and the heat input should be controlled particularly with 4mm and 5mm diameter electrodes.
Alloy type
Cr-Ni-Mo-Cu alloy of the generic 825 type.
In the as-welded condition the weld metal microstructure is fully austenitic.
Materials to be welded

EN W.Nr.: 2.4858 (NiCr21Mo), 1.4563 (X 1 NiCrMoCu 31 27 4).
ASTM: N08825, N08028.
PROPRIETARY: Incoloy® 825, 825CP cast (Special Metals), Nicrofer 4221 (VDM), Nicrofer 3127LC (VDM), Sanicro 28 (Sandvik).

Products of the line 825

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