Sanicro® 41Cu is a nickel-iron-chromium strip electrode used for electro-slag welding (ESW) to deposit single layer or second layer corrosion resistant alloy overlays of Ni8065/UNS N08825 composition on carbon- and low alloyed steels using non-alloying flux.
The grade has very good resistance to stress corrosion cracking (SCC) in chloride containing environments and is particularly suited for use in reducing environments such as those containing sulphuric and phosphoric acids.
- ISO 18274: Ni 8065
- AWS A5.14/ASME SFA5.14: EQNiFeCr-1
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Chemical composition (nominal) %
Sanicro 41Cu is used for corrosion resistant alloy surfacing of components in the chemical, pollution control, oil & gas and petrochemical industries and often in connection with sour gas service. Typical components are tanks, heat exchangers, evaporators and scrubbers etc.
Forms of supply
Strip electrodes are delivered in coils with internal diameter 305 mm.
|Standard dimensions||0.5 x 30, 60, 90, 120 mm|
|0.4 x 50, 75, 150 mm|
|Max coil weight||700 kg|
Weld metal characteristics
The following data is typical for single layer deposits made by the ESW method using the non-alloying flux Sandvik 57S.
The figures for overlay chemical composition are given as examples. The weld parameters selected and conditions under which welding is carried out may influence the result obtained.
Fully austenitic microstructure.
Sanicro 41Cu shows very good corrosion resistance in both reducing and oxidizing media, and has good resistance to general corrosion, pitting, crevice corrosion and stress corrosion cracking. It is particularly useful in environments such as sulfuric acid, phosphoric acid, sulfur-containing flue gases, sour oil and gas wells, and sea water.
For electro-slag welding (ESW) and submerged arc welding (SAW), weld fluxes are used for protective shielding of the weld metal.
Recommended flux for Sandvik Sanicro 41Cu