Sanicro® 41Cu welding wire is suitable for overlay welding when a deposit with chemistry corresponding to UNS N08825 is required. The weld deposit is a nickel-iron-chromium-molybdenum-copper alloy suitable for use in extremely corrosive environments.
Sanicro® 41Cu 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. Sanicro® 41Cu is available as wire and rods.
- ISO 18274: Ni8065
- AWS A5.14/ASME SFA5.14: ERNiFeCr-1
Contact your nearest sales office for details.
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, transport pipes and scrubbers etc.
Forms of Supply
Sanicro® 41Cu is available in wire and rods.
Weld Metal Characteristics
The following data is typical for two layer deposits made by the TIG, MIG, or PAW methods using argon as shielding gas, or SAW using flux Sandvik 50SW.
The microstructure is fully austenitic.
Hot wire TIG
|Temperature||°C (F)||20 (68)|
|Yield strength, Rp0.2||MPa||340 (49)|
|Tensile strength, Rm||MPa||550 (80)|
|Hardness, Vickers/Brinell||HV5/HRB||174 (81)|
Sanicro® 41Cu overlay welding performed with Hot wire TIG passes side bend testing according to ISO 15614-7 and ASME IX QW-163.
Sanicro® 41Cu shows very good resistance to pitting corrosion and stress corrosion cracking (SCC) in chloride-containing environments and passes the ASTM G48 A at 25°C.
Sanicro 41Cu has good resistance to intergranular corrosion with a corrosion rate < 0.4 mm/year when tested acc. to ASTM G28 A.
Nickel, together with molybdenum and copper, also gives excellent resistance to reducing environments such as those containing sulfuric and phosphoric acids. The alloy's chromium content gives good resistance in oxidizing environments such as nitric acid.
Recommended welding data
Electrode positive is used to give good penetration in all types of welding joint. The following table shows common conditions for MIG welding.
|Wire diameter,mm||Wire feed, m/mm (in./min)||Current, A||Voltage, V||Gas, l/min. (CFH)|
|1.2||3-10 (118-394)||130-230||23-27||20 (42)|
1) Pulse parameters:Peak current 300–400 A
Background current 50–130 A
Frequency 80–120 Hz
|Wire diameter,mm||Current, A||Voltage, V||Gas, l/min. (CFH)|
|2.4 (manual)||100-200||9-12||9-12 (19-25)|
|1.2 (mechanized)||180-220||10-12||9-12 (19-25)|
Electrode negative and a shielding gas of argon or helium should be used to prevent oxidation of the weld metal.
Electrode positive is suggested for joint welding to give good penetration.
|Wire diameter, mm||Current, A||Voltage, V||Travel speed,mm/min|
Recommended welding flux is Sandvik 50SW.